Definition of "let" in English

verb

1. (transitive) To allow to, not to prevent (+ infinitive, but usually without to).

   • After he knocked for hours, I decided to let him come in.

2. (transitive) To allow to be or do without interference; to not disturb or meddle with; to leave alone.

   • Let me be!

3. (transitive) To allow the release of (a fluid).

   • The physicians let about a pint of his blood, but to no avail.

4. (transitive, chiefly British) To 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. (transitive) To 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. (auxiliary, transitive) Used to introduce a first or third person imperative verb construction.

   • Let's put on a show!
   • Let us have a moment of silence.
   • Let me just give you the phone number.
   • Let P be the point where AB and OX intersect.
   • "Let there be no doubt: I saw you boyfriend with another girl" "Let him. I don't care anymore".

7. (transitive, obsolete except with know or be) To cause (+ bare infinitive).

   • Can you let me know what time you'll be arriving?

noun

1. The allowing of possession of a property etc. in exchange for rent.

verb

1. (archaic) To hinder, prevent, impede, hamper, cumber; to obstruct (someone or something).

2. (obsolete) To prevent someone from doing something; also to prevent something from happening.

3. (obsolete) To tarry or delay.

noun

1. An obstacle or hindrance.

   • Without let or hindrance

2. (tennis) The hindrance caused by the net during serve, only if the ball falls legally.