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let

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Let is defined as to allow, to give the use of or leave someone or something.

(verb)

An example of let is someone permitting another to use their car.
An example of let is to rent out a room in your home.

See let in Webster's New World College Dictionary

transitive verb let, letting

to leave; forsake; abandon: now only in phrases or , to refrain from bothering, disturbing, touching, etc.
1. to give the use of (a house, room, etc.) to a tenant in return for rent; rent; hire out
2. to give out (work), assign (a contract), etc.
to allow or cause to escape; cause to flow or come out, as by shedding, emitting, etc.: to let blood
to allow to pass, come, or go: let me in
to allow; permit: followed by an infinitive, normally without to[let me help], or by an adverb, etc. with the verb itself unexpressed [let me up]
to cause to; make: usually with know or hear: let me hear from you

Origin: ME leten < OE lætan, to leave behind, akin to Ger lassen < IE *lēd- < base *lēi-, to neglect, leave behind > late, L letum, death

intransitive verb

to be rented or leased: house to let

transitive verb letted or let, letting

Archaic to hinder; obstruct; prevent

Origin: ME letten < OE lettan, to hinder, lit., to make late (akin to Goth latjan, to delay) < base of læt, late

noun

an obstacle or impediment: used in the legal phrase
Tennis, etc. an interference with the course of the ball in some way specified in the rules, making it necessary to play the point over again

small: piglet, starlet
a small object worn as a band on (a specified part of the body): armlet

Origin: ME < MFr -el (< L -ellus) + -et, both dim. suffixes

See let in American Heritage Dictionary 4

verb let let, let·ting, lets

verb, transitive

To give permission or opportunity to; allow: I let them borrow the car. The inheritance let us finally buy a house. See Usage Note at leave¹.
To cause to; make: Let the news be known.
a. Used as an auxiliary in the imperative to express a command, request, or proposal: Let's finish the job! Let x equal y.
b. Used as an auxiliary in the imperative to express a warning or threat: Just let her try!
To permit to enter, proceed, or depart: let the dog in.
To release from or as if from confinement: let the air out of the balloon; let out a yelp.
To rent or lease: let rooms.
To award, especially after bids have been submitted: let the construction job to a new firm.

verb, intransitive

To become rented or leased.
To be or become assigned, as to a contractor.

Phrasal Verbs: let down To cause to come down gradually; lower: let down the sails.

a. To withdraw support from; forsake.

b. To fail to meet the expectations of; disappoint.

let on To allow to be known; admit: Don't let on that you know me. To pretend. let out To come to a close; end: School let out early. The play let out at 11 P.M. To make known; reveal: Who let that story out? To increase the size of (a garment, for example): let out a coat. let up To slow down; diminish: didn't let up in their efforts. To come to a stop; cease: The rain let up.

Origin:

Origin: Middle English leten

Origin: , from Old English lǣtan; see lē- in Indo-European roots

noun

Something that hinders; an obstacle: free to investigate without let or hindrance.
Sports An invalid stroke in tennis and other net games that requires a replay.

transitive verb let·ted or let, let·ting, lets
Archaic

To hinder or obstruct.

Origin:

Origin: Middle English lette

Origin: , from letten, to hinder

Origin: , from Old English lettan; see lē- in Indo-European roots

suffix