Definitions
1.verbTo allow to, not to prevent (+ infinitive, but usually without to)."After he knocked for hours, I decided to let him come in."
2.verbTo leave."Let me alone!"
3.verbTo allow the release of (a fluid)."The physicians let about a pint of his blood, but to no avail."
4.verbTo allow possession of (a property etc.) in exchange for rent."I decided to let the farmhouse to a couple while I was working abroad."
5.verbTo give, grant, or assign, as a work, privilege, or contract; often with out."to let the building of a bridge; to let out the lathing and the plastering"
6.verbUsed to introduce an imperative in the first or third person."Let P be the point where AB and OX intersect."
7.verbTo cause (+ bare infinitive)."Can you let me know what time you'll be arriving?"
8.verbTo hinder, prevent, impede, hamper, cumber; to obstruct (someone or something).
9.verbTo prevent someone from doing something; also to prevent something from happening.
10.verbTo tarry or delay.
11.nounThe rental of accommodation.
12.nounThe award of a public contract