red flag

Meaning

1. (literally) A flag that is red, especially associated with leftist revolutionary ideologies.
2. (literally) A flag that is red, especially associated with leftist revolutionary ideologies.
3. (informal) A cue, warning, or alert; a sign or signal that something is wrong.
4. (US, idiomatic) Something that will enrage a particular person; a red rag.
5. (UK) A flag formerly used by a railway guard to warn the driver not to start the train.

Opposite of

green flag

Synonyms

alert

caveat

warning

⚠️

admonishment

heads-up

monition

caution

admonition

alarm

Translations

Warnhinweis

⚠️

تَحْذير

Warnsignal

advertiment

⚠️

advertència

⚠️

alarme

avís

⚠️

Warnung

⚠️

Warnmeldung

Alarmierung

Wahrschau

⚠️

συναγερμός

تحذير

mise en garde

إنذار