To let is to allow or permit. If you don't prevent your little brother from jumping off the roof into a pile of leaves, you let him do it.

Your boss might let you take a few days off work, and the friendly city bus driver might let you ride for free when you forget your wallet. Another way to let is to allow someone or something to pass in a certain direction, like a window that lets in the morning sunshine. The word can also mean "lease" or "rent," so a landlord might let a room over his garage to a college student.

Primary Meanings of let

actively cause something to happen
grant use or occupation of under a term of contract
a serve that strikes the net before falling into the receiver's court; the ball must be served again
Full Definitions of let

v actively cause something to happen

“I let it be known that I was not interested”
Type of:
cause, get, have, induce, make, stimulate
cause to do; cause to act in a specified manner

v make it possible through a specific action or lack of action for something to happen

allow, permit
keep, prevent
stop (someone or something) from doing something or being in a certain state
hold and prevent from leaving
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allow to go without comment or censure

v consent to, give permission

“I won't let the police search her basement”
allow, countenance, permit
allow, grant
let have
disallow, forbid, interdict, nix, prohibit, proscribe, veto
command against
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abide, bear, brook, digest, endure, put up, stand, stick out, stomach, suffer, support, tolerate
put up with something or somebody unpleasant
grant a leave to
allow to have or take
allow, permit, tolerate
allow the presence of or allow (an activity) without opposing or prohibiting
authorise, authorize, clear, pass
grant authorization or clearance for
admit, include, let in
allow participation in or the right to be part of; permit to exercise the rights, functions, and responsibilities of
favor, favour, privilege
bestow a privilege upon
decriminalise, decriminalize, legalise, legalize, legitimate, legitimatise, legitimatize, legitimise, legitimize
make legal
allow without fear
admit, allow in, intromit, let in
allow to enter; grant entry to
accept, live with, swallow
tolerate or accommodate oneself to
hold still for, stand for
tolerate or bear
bear up
endure cheerfully
take lying down
suffer without protest; suffer or endure passively
take a joke
listen to a joke at one's own expense
sit out
endure to the end
bear (a cost or penalty), in recompense for some action
approve or sanction officially
authorize by certificate
O.K., approve, okay, sanction
give sanction to
induct, initiate
accept people into an exclusive society or group, usually with some rite
admit again or anew
authorize payments of
certify, licence, license
authorize officially
charge with a task
formalise, formalize, validate
declare or make legally valid
monetise, monetize
give legal value to or establish as the legal tender of a country
admit back into the country
admit anew
engage as a participant
Type of:
accept, consent, go for
give an affirmative reply to; respond favorably to

v cause to move; cause to be in a certain position or condition

“This let me in for a big surprise”
get, have
Type of:
get, make
give certain properties to something

v leave unchanged

let it be”
Type of:
leave, leave alone, leave behind
leave unchanged or undisturbed or refrain from taking

v grant use or occupation of under a term of contract

lease, rent
sublease, sublet
lease or rent all or part of (a leased or rented property) to another person
Type of:
transfer possession of something concrete or abstract to somebody

n a serve that strikes the net before falling into the receiver's court; the ball must be served again

net ball
Type of:
serve, service
(sports) a stroke that puts the ball in play

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