red flag

名词 n.

英文释义

名词 n.
  1. A flag that is red, especially associated with leftist revolutionary ideologies. literally
    — Some chanted: "Pride, pride, national pride" and "Poland should be national not red or rainbow-coloured", in a reference to the red flag of the Soviet Union and the symbol of gay pride.
  2. A flag that is red, especially associated with leftist revolutionary ideologies.; A flag used as a signal that the race must be stopped immediately (and possibly restarted). literally
    — Typically, a red flag is used when it rains or when the safety of the clean-up crews is in danger because there is too much debris or oil on the track.
  3. A cue, warning, or alert; a sign or signal that something is wrong. figuratively,informal
    — Improper formatting is a red flag to look for other problems with the data.
  4. Something that will enrage a particular person; a red rag. US,idiomatic
  5. A flag formerly used by a railway guard to warn the driver not to start the train. UK

词形变化

red flags plural
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