yellow flag

noun

1. Nautical. quarantine flag.
2. water flag.

yellow flag

noun

1. another name for quarantine flag
2. See flag 3

Word History and Origins

Origin of yellow flag¹

First recorded in 1775–85

Example Sentences

Drive past an intersection linking central Beirut to the Dahiyeh’s edge, where Hezbollah’s yellow flags start to appear on lampposts and the din of Israeli drones grows louder, and traffic rapidly melts away.

From Los Angeles Times

Unverified video posted online appeared to show people carrying yellow flags of the Khalistan movement - which demands a separate Sikh homeland in India - clashing with others holding Indian flags.

From BBC

Russell qualified on the front row for the sprint race, and Hamilton looked like he could have got pole for that event had he not come across yellow flags on his qualifying lap.

From BBC

But this backfired when Williams driver Franco Colapinto, who was the only other driver out on track with them, spun at Turn 12 and Hamilton had to slow down for the subsequent yellow flags.

From BBC

But in Baku Norris was caught out by a yellow flag in qualifying and ended up starting way down the grid, and Piastri won.

From BBC