red flag

red flag

noun

Definition of RED FLAG

something that tells of approaching danger or risk <the résumé she accidentally left on the office printer was a red flag that she was planning to quit>

Synonyms caution, red flag, red light, tip-off, tocsin, wake-up call

Related Words omen, portent, premonition, presage; notice, notification; buoy, indicator, knell, sign, signal; foretaste, foretoken; announcement, declaration

Near Antonyms all clear