What is the meaning of flag?

noun

• Emblem usually consisting of a rectangular piece of cloth of distinctive design.
• A listing printed in all issues of a newspaper or magazine (usually on the editorial page) that gives the name of the publication and the names of the editorial staff, etc..
  • synonyms: masthead
• Plants with sword-shaped leaves and erect stalks bearing bright-colored flowers composed of three petals and three drooping sepals.
  • synonyms: iris, fleur-de-lis, sword lily
• A rectangular piece of fabric used as a signalling device.
  • synonyms: signal flag
• Flagpole used to mark the position of the hole on a golf green.
  • synonyms: pin
• Stratified stone that splits into pieces suitable as paving stones.
  • synonyms: flagstone
• A conspicuously marked or shaped tail.

verb

• Communicate or signal with a flag.
• Provide with a flag.
  • usage: "Flag this file so that I can recognize it immediately"
• Droop, sink, or settle from or as if from pressure or loss of tautness.
  • synonyms: sag, droop, swag
• Decorate with flags.
  • usage: "the building was flagged for the holiday"
• Become less intense.
  • synonyms: ease up, ease off, slacken off