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lock

A lock is a tool that keeps a room, house, drawer, or box securely closed. You generally need a key, password, or combination to open a lock.

You might use a padlock on your gym locker, opening it with a tiny key or a secret series of numbers. There are also locks called "bolts" like the one on your front door, and bicycle locks that protect your bike while you're at work. Lock also means "to secure with a lock" or "keep securely enclosed," like when you lock your goat in the yard to keep him from eating the neighbor's rose bushes.

Definitions of lock
  1. noun
    a fastener fitted to a door or drawer to keep it firmly closed
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    types:
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    combination lock
    lock that can be opened only by turning dials in a special sequence
    cylinder lock
    a lock in which a cylinder rotates to move a bolt; tumblers are pins; inserting the key lifts and aligns the pins to free the cylinder to rotate
    doorlock
    a lock on an exterior door
    door latch, latch
    spring-loaded doorlock that can only be opened from the outside with a key
    lever lock
    a lock whose tumblers are levers that must be raised to a given position so that the bolt can move
    padlock
    a detachable lock; has a hinged shackle that can be passed through the staple of a hasp or the links in a chain and then snapped shut
    sash fastener, sash lock, window lock
    a lock attached to the sashes of a double hung window that can fix both in the shut position
    night latch
    doorlock operated by a knob on the inside and a key on the outside
    type of:
    fastener, fastening, fixing, holdfast
    restraint that attaches to something or holds something in place
  2. verb
    fasten with a lock
    lock the bike to the fence”
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    Antonyms:
    unlock
    become unlocked
    unlock
    open the lock of
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    types:
    padlock
    fasten with a padlock
    bolt
    secure or lock with a bolt
    type of:
    fasten, fix, secure
    cause to be firmly attached
  3. verb
    place in a place where something cannot be removed or someone cannot escape
    “The parents locked her daughter up for the weekend”
    “She locked her jewels in the safe”
    synonyms: lock away, lock in, lock up, put away, shut away, shut up
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    type of:
    confine
    prevent from leaving or from being removed
  4. verb
    keep engaged
    synonyms: engage, mesh, operate
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    Antonyms:
    disengage, withdraw
    release from something that holds fast, connects, or entangles
    types:
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    flip, switch, throw
    cause to go on or to be engaged or set in operation
    ride
    keep partially engaged by slightly depressing a pedal with the foot
    switch on, turn on
    cause to operate by flipping a switch
    cut, switch off, turn off, turn out
    cause to stop operating by disengaging a switch
    type of:
    displace, move
    cause to move or shift into a new position or place, both in a concrete and in an abstract sense
  5. noun
    enclosure consisting of a section of canal that can be closed to control the water level; used to raise or lower vessels that pass through it
    synonyms: lock chamber
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    type of:
    enclosure
    a structure consisting of an area that has been enclosed for some purpose
  6. verb
    build locks in order to facilitate the navigation of vessels
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    type of:
    build, construct, make
    make by combining materials and parts
  7. verb
    pass by means through a lock in a waterway
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    type of:
    go across, go through, pass
    go across or through
  8. noun
    a mechanism that detonates the charge of a gun
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    type of:
    mechanism
    device consisting of a piece of machinery; has moving parts that perform some function
  9. verb
    hold fast (in a certain state)
    “He was locked in a laughing fit”
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    type of:
    overcome, overpower, overtake, overwhelm, sweep over, whelm
    overcome, as with emotions or perceptual stimuli
  10. verb
    become rigid or immoveable
    “The therapist noticed that the patient's knees tended to lock in this exercise”
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    Antonyms:
    unlock
    become unlocked
    type of:
    engage
    get caught
  11. verb
    become engaged or intermeshed with one another
    “They were locked in embrace”
    synonyms: interlock
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    type of:
    bosom, embrace, hug, squeeze
    squeeze (someone) tightly in your arms, usually with fondness
  12. verb
    hold in a locking position
    “He locked his hands around her neck”
    synonyms: interlace, interlock
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    type of:
    hold, take hold
    have or hold in one's hands or grip
  13. noun
    any wrestling hold in which some part of the opponent's body is twisted or pressured
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    types:
    hammerlock
    a wrestling hold in which the opponent's arm is twisted up behind his back
    headlock
    a wrestling hold in which the opponent's head is locked between the crook of your elbow and the side of your body
    type of:
    wrestling hold
    a hold used in the sport of wrestling
  14. noun
    a restraint incorporated into the ignition switch to prevent the use of a vehicle by persons who do not have the key
    synonyms: ignition lock
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    type of:
    constraint, restraint
    a device that impede's something's motion
  15. noun
    a strand or cluster of hair
    synonyms: curl, ringlet, whorl
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    types:
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    sausage curl
    a fat sausage-shaped curl
    forelock
    a lock of hair growing (or falling) over the forehead
    crimp
    a lock of hair that has been artificially waved or curled
    dreadlock
    one of many long thin braids of hair radiating from the scalp; popularized by Rastafarians
    tress
    (usually plural) a long lock of hair
    quiff
    a prominent forelock (especially one brushed upward from the forehead)
    pin curl
    a curl of hair made by dampening a strand of hair and curling it and holding the curl with a clip or bobby pin
    kiss curl, spit curl
    a spiral curl plastered on the forehead or cheek
    type of:
    hair
    a covering for the body (or parts of it) consisting of a dense growth of threadlike structures (as on the human head); helps to prevent heat loss
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