1 be seated, settle, sit down, take a seat, rest, Colloq take the weight or a load off one's feet:
Come in and sit with me for a while. If you sit on that chair it will break
2 hold a session, be in session, assemble, meet, convene; gather, get together:
The Supreme Court of the United States will be sitting next week.
3 Often, sit on. have or hold or occupy a seat (on), participate (in), be a member (of):
Kathy sits on the board of directors.
4 remain, stay, lie, rest; relax, mark time, abide, dwell:
Let the dough sit a while to rise. Anita sat in Vienna awaiting her instructions
5 seat, contain, hold, accommodate, have seats or seating for, have room or space or capacity for seating:
The auditorium sits only 600.
6 sit in.
(a) Often, sit in on. play, join (in), participate (in), take part (in); observe, watch:
Mind if I sit in on your poker game? We invited Mary Lou to sit in during our discussion.
(b) substitute, fill in, stand in, double, Colloq cover, sub, US pinch-hit:
Mary Lou often sat in for our pianist if he had another gig.
7 sit out.
wait out, outwait, outstay, outlast, outlive, last through, live through:
Will sat out endless dances. He sat out the whole evening merely waiting to walk home with Lily
8 sit tight.
wait, hang back, hold back, be patient, bide (one's) time, play a waiting game, take no action, delay, temporize, Colloq hold (one's) horses:
Just sit tight till you hear from them - don't jump the gun.
9 sit up.
awaken, pay attention, notice, become alert or interested or concerned:
Jennie's performance in the hurdles made many track coaches sit up.
10 sit (with).
Often, sit well or right (with). agree with, be agreeable to; seem, appear, look:
The way Ashton handled the matter did not sit well with the directors.