flag

noun1 of 2

piece of cloth, frequently marked with a colorful symbol or sign

• “Be aware of any flags or signs indicating dangerous conditions.”Tatoeba
• “A red and white flag was flying in the wind.”Tatoeba

Sentences from Tatoeba show real usage. A word can have several meanings, so a sentence may use another one.

verb2 of 2

(often with down) To signal to, especially to stop a passing vehicle etc.