open

Something that's open allows you to move or see through it, like an open window or an open gate.

The adjective open describes something that's not closed or blocked up, like open curtains that provide a view of the garden outside. Open can also refer to something that's unfastened or parted — an open jar of peanut butter, an open eye, or an open book. Things that are vulnerable, straightforward, or uncovered are also open, and if you are open to suggestions, it means you are willing to consider new ideas.

Primary Meanings of open

1.
adjvn
affording free passage or access
cause to open or to become open
a clear or unobstructed space or expanse of land or water
2.
adjvn
accessible to all
become available
a tournament in which both professionals and amateurs may play
3.
adj
possibly accepting or permitting
Full Definitions of open
1

adj affording free passage or access

open drains”
“the road is open to traffic”
open ranks”
Synonyms:
unfastened
affording unobstructed entrance and exit; not shut or closed
opened
made open or clear
unstoppered
(of a container) having the stopper removed
yawning
gaping open as if threatening to engulf someone or something
unsealed
not closed or secured with or as if with a seal
Antonyms:
closed
not open or affording passage or access
obstructed
shut off to passage or view or hindered from action
closed, shut, unopen
not open
blocked, out of use
closed to traffic
drawn
having the curtains or draperies closed or pulled shut
stoppered
(of a container) having a stopper in the opening
nonopening
not open; not opening
sealed
closed or secured with or as if with a seal
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adj affording unobstructed entrance and exit; not shut or closed

“an open door”
“they left the door open
Synonyms:
unfastened
ajar
slightly open
wide-open
open wide
Antonyms:
closed, shut, unopen
not open
closed
not open or affording passage or access
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adj affording free passage or view

open waters”
“the open countryside”
Synonyms:
clear
unobstructed
free from impediment or obstruction or hindrance

adj used of mouth or eyes

“keep your eyes open
“his mouth slightly opened
Synonyms:
opened
agape, gaping
with the mouth wide open as in wonder or awe
agaze, staring
(used of eyes) open and fixed as if in fear or wonder
wide, wide-eyed
(used of eyes) fully open or extended
yawning
with the mouth wide open indicating boredom or sleepiness
Antonyms:
closed, shut
used especially of mouth or eyes
blinking, winking
closing the eyes intermittently and rapidly
compressed, tight
pressed tightly together
squinched, squinting
having eyes half closed in order to see better
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adj not sealed or having been unsealed

“the letter was already open
“the opened package lay on the table”
Synonyms:
opened
unsealed
not closed or secured with or as if with a seal

adj (set theory) of an interval that contains neither of its endpoints

Antonyms:
closed
(set theory) of an interval that contains both its endpoints

adj (of textures) full of small openings or gaps

“an open texture”
Synonyms:
loose
coarse, harsh
of textures that are rough to the touch or substances consisting of relatively large particles

v cause to open or to become open

“Mary opened the car door”
Synonyms:
open up
Antonyms:
close, shut
move so that an opening or passage is obstructed; make shut
close, shut
become closed
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Types:
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unbar
remove a bar from (a door)
break open
open with force
click open
open with a clicking sound
reopen
open again or anew
unlock
open the lock of
unbolt
undo the bolt of
unseal
break the seal of
uncork
draw the cork from (bottles)
jimmy, lever, prise, prize, pry
to move or force, especially in an effort to get something open
breach, gap
make an opening or gap in
lance
open by piercing with a lancet

v become open

“The door opened
Synonyms:
open up
Antonyms:
close, shut
become closed
close, shut
move so that an opening or passage is obstructed; make shut
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Types:
unfasten
become undone or untied
fly open
come open suddenly
Type of:
change state, turn
undergo a transformation or a change of position or action

v have an opening or passage or outlet

“The bedrooms open into the hall”

v afford access to

“the door opens to the patio”
Synonyms:
afford, give

v spread out or open from a closed or folded state

open the map”
Synonyms:
spread, spread out, unfold
Antonyms:
fold, fold up, turn up
bend or lay so that one part covers the other
Types:
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divaricate
spread apart
exfoliate
spread by opening the leaves of
grass
spread out clothes on the grass to let it dry and bleach
butterfly
cut and spread open, as in preparation for cooking
uncross
change from a crossed to an uncrossed position
splay
spread open or apart
Type of:
undo
cancel, annul, or reverse an action or its effect

n a clear or unobstructed space or expanse of land or water

“finally broke out of the forest into the open
Synonyms:
clear
Type of:
area, country
a particular geographical region of indefinite boundary (usually serving some special purpose or distinguished by its people or culture or geography)

n where the air is unconfined

“the concert was held in the open air”
“camping in the open
Synonyms:
open air, out-of-doors, outdoors
Type of:
exterior, outside
the region that is outside of something
2

adj accessible to all

open season”
“an open economy”
Synonyms:
unrestricted
not subject to or subjected to restriction

adj open to or in view of all

“an open protest”
“an open letter to the editor”
Synonyms:
public
not private; open to or concerning the people as a whole

adj ready for business

“the stores are open
Synonyms:
active
full of activity or engaged in continuous activity

adj open and observable; not secret or hidden

open ballots”
Synonyms:
overt
explicit, expressed
precisely and clearly expressed or readily observable; leaving nothing to implication
bald, barefaced
with no effort to conceal
naked, raw
devoid of elaboration or diminution or concealment; bare and pure
undisguised
plain to see
visible
obvious to the eye
public
not private; open to or concerning the people as a whole
unconcealed
not concealed or hidden
Antonyms:
covert
secret or hidden; not openly practiced or engaged in or shown or avowed
implicit, inexplicit
implied though not directly expressed; inherent in the nature of something
backstair, backstairs, furtive
secret and sly or sordid
black
(of intelligence operations) deliberately misleading
clandestine, cloak-and-dagger, hole-and-corner, hugger-mugger, hush-hush, secret, surreptitious, undercover, underground
conducted with or marked by hidden aims or methods
secret
indulging only covertly
collusive, conniving
acting together in secret toward a fraudulent or illegal end
cloaked, disguised, masked
having its true character concealed with the intent of misleading
secret
communicated covertly
behind-the-scenes, sub-rosa, under-the-table
designed and carried out secretly or confidentially
subterranean, subterraneous, ulterior
lying beyond what is openly revealed or avowed (especially being kept in the background or deliberately concealed)
under wraps
kept secret
undisclosed, unrevealed
not made known
concealed
hidden on any grounds for any motive
invisible, unseeable
impossible or nearly impossible to see; imperceptible by the eye
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adj openly straightforward and direct without reserve or secretiveness

“an open and trusting nature”
Synonyms:
candid, heart-to-heart
artless, ingenuous
characterized by an inability to mask your feelings; not devious

adj ready or willing to receive favorably

Synonyms:
receptive
acceptant, acceptive
accepting willingly
admissive
characterized by or allowing admission
assimilative
capable of mentally absorbing
hospitable
having an open mind
Antonyms:
unreceptive
not receptive
closed, unsympathetic
not having an open mind
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adj not requiring union membership

“an open shop employs nonunion workers”
Synonyms:
nonunion
not belonging to or not allowing affiliation with a trade union

adj without undue constriction as from e.g. tenseness or inhibition

“the clarity and resonance of an open tone”
“her natural and open response”
Synonyms:
unconstricted
not constricted physically or by extension psychologically

adj not defended or capable of being defended

“an open city”
open to attack”
Synonyms:
assailable, undefendable, undefended
vulnerable
susceptible to attack

adj having no protecting cover or enclosure

“an open boat”
“an open fire”
open sports cars”
Synonyms:
unenclosed
not closed in our surrounded or included

adj with no protection or shield

open to the weather”
“an open wound”
Synonyms:
exposed
unprotected
lacking protection or defense

v become available

“an opportunity opened up”
Synonyms:
open up
Type of:
arise, come up
result or issue

v make available

“This opens up new possibilities”
Synonyms:
open up
Type of:
afford, give, yield
be the cause or source of

v display the contents of a file or start an application as on a computer

Antonyms:
close
cause a window or an application to disappear on a computer desktop
Type of:
display, exhibit, expose
to show, make visible or apparent

v start to operate or function or cause to start operating or functioning

open a business”
Synonyms:
open up
Antonyms:
close, close down, close up, fold, shut down
cease to operate or cause to cease operating
Types:
establish, found, launch, set up
set up or found

v begin or set in action, of meetings, speeches, recitals, etc.

“He opened the meeting with a long speech”
Antonyms:
close
finish or terminate (meetings, speeches, etc.)
Types:
inaugurate
open ceremoniously or dedicate formally
call to order
open formally
Type of:
commence, embark on, start, start up
get off the ground

v make the opening move

“Kasparov opened with a standard opening”
Type of:
go, move
have a turn; make one's move in a game

n a tournament in which both professionals and amateurs may play

Type of:
tournament, tourney
a sporting competition in which contestants play a series of games to decide the winner

n information that has become public

“all the reports were out in the open
Synonyms:
surface
Type of:
general knowledge, public knowledge
knowledge that is available to anyone
3

adj possibly accepting or permitting

open to interpretation”
“an issue open to question”
Synonyms:
capable, subject
susceptible
(often followed by `of' or `to') yielding readily to or capable of

adj not brought to a conclusion; subject to further thought

“an open question”
Synonyms:
undecided, undetermined, unresolved
unsettled
still in doubt

adj not having been filled

“the job is still open
Synonyms:
available
obtainable or accessible and ready for use or service

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