Red flag Meaning, Definition & Usage

  1. noun a flag that serves as a warning signal
    • we didn't swim at the beach because the red flag was up
  2. noun the emblem of socialist revolution
  3. noun something that irritates or demands immediate action
    • doing that is like waving a red flag in front of a bull

WordNet


Definitions
  1. . See under Flag.
Definitions
  1. a flag of a red color, displayed as a signal of danger or token of defiance; the emblem of anarchists.

Webster 1913