flag - definition and synonyms

verb 

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/flæɡ/
present tense
I/you/we/theyflag
he/she/itflags
present participleflagging
past tenseflagged
past participleflagged
  1. 1
    [intransitive] to become tired or weak, or to begin to lack enthusiasm

    After a long day, his energy flagged.

    The conversation was flagging until the mention of her name.

  2. 2
    [transitive] to mark something so that you will be able to find it again

    I flagged any words I didn’t know.

phrasal verbs