Definition of "sit on" in English

Verb

1. To block, suppress, restrain (something).

   • The chairman sat on the report until the end of the legislative session.

2. To restrain (a person).

   • He started to act up, but she sat on him.

3. To take no action on (something); to hold (something) in reserve without actually using.

   • I sent the boss my proposal three weeks ago and he's just been sitting on it.

4. To be a member of (something).

   • He sits on the appropriations committee.

5. To hold an official inquiry regarding (something); to deliberate about (something).

6. To insert (something) into one's vagina or anus from below.

   • Let me sit on it.

7. Used other than figuratively or idiomatically: see sit,‎ on.

   • The cat sat on the mat.