red light Synonyms

stop light stoplight warning light pedestrian light handwriting on the wall Aunt Flo amber light turndown wake-up call traffic signal traffic light casus belli writing on the wall red rag red traffic light red lamp delicate subject advance warning traffic control yellow light warning sign thumbs down stop sign red flag warning forewarning disapproval caution blinker avant-courier auspice announcement alert alarum alarm indication no veto tocsin signal sign semaphore rejection refusal rebuff prenotion nod admonition