- the symbol or banner of a left-wing revolutionary party.
- a danger signal.
- something that provokes an angry or hostile reaction: The talk about raising taxes was a red flag to many voters.
- a red burgee, designating in the International Code of Signals the letter “B,” flown by itself to show that a vessel is carrying, loading, or discharging explosives or highly inflammable material.
- a war game the U.S. Air Force holds several times each year at Nellis Air Force Base, Nevada, to train personnel in air combat.
- to mark or draw attention to for a particular purpose: The department has red-flagged the most urgent repair work to be done.
- to provoke the attention of; alert; arouse: The animal's refusal to eat red-flagged the keeper that something was wrong.
- of or relating to a red flag.
- intended or serving to emphasize, warn, incite, or provoke.
- a symbol of socialism, communism, or revolution
- a warning of danger or a signal to stop
- a socialist song, written by James Connell (1852–1929), Irish political activist, in 1889
