flag up

British

verb

(tr; adverb) to bring (something) to someone's attention; point out

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Example Sentences

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See Examples For:

flag up

The linesman has been told all season not to put their flag up, so their brain has been trained.

From BBC ● Feb. 15, 2026

An email was then sent to surgical trainees inviting them to flag up concerns, leading to Gilbert's dismissal in May 2022.

From BBC ● Feb. 6, 2026

Teams can flag up to 30 plays for review per game through a league portal — including isolated calls or themes spanning multiple games.

From Los Angeles Times ● Aug. 3, 2025

"When an offside is so clear and obvious I think it is the duty of the assistant referee to put their flag up and stop play," former England women's midfielder Fara Williams told BBC Sport.

From BBC ● May 14, 2025

I could see their silver flag up ahead, only one guard, who wasn’t even looking in my direction.

From "The Titan's Curse" by Rick Riordan

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023