Definition of "sit on"

sit on

verb
third-person singular simple present sits on, present participle sitting on, simple past and past participle sat on
1. (idiomatic) To block, suppress, restrain.
2. (idiomatic, informal) To restrain (a person).
3. (idiomatic) To take no action on; to hold in reserve without actually using.
4. To be a member of.
5. To hold an official inquiry regarding; to deliberate about.
6. Used other than figuratively or idiomatically: see sit,‎ on.