What is the meaning of flagging?

noun

• Flagstones collectively.
  • usage: "there was a pile of flagging waiting to be laid in place"
• A walk of flagstones.
  • usage: "the flagging in the garden was quite imaginative"

verb

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

adjective

• Weak from exhaustion.
  • synonyms: drooping