to mention something so that people know about it
Hitler stood a flag up which had fallen over and began to talk about an SS panzer division, which was three weeks from the action.
I am going to run a flag up the flagpole and see who salutes.
Some of them had Post-it notes on the cover to flag up pages of interest.
They’ve already flagged up several problems.
flags up
flagging up
flagged up
There is no origin for this phrasal verb
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