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Related to sit tight: put aside, in line with, take it for granted
to wait; to wait patiently. (This does not necessarily refer to sitting.) Just relax and sit tight. I'll be right with you. We were waiting in line for the gates to open when someone came out and told us to sit tight because it wouldn't be much longer before we could go in.
to wait patiently and take no action You just sit tight while I go get help.
1. to remain in a place, usually sitting down Just sit tight while I go and phone for help. Sit tight and don't move that leg.
2. to not take any action while you wait for something to happen Shareholders are advised to sit tight and see how the situation develops.See stand pat
Be patient, take no action, as in If you just sit tight I'm sure your passport will be returned to you. [Colloquial; first half of 1700s]
To be patient and await the next move.