flat - definition and synonyms


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  1. 1
    stretched out or lying on a surface

    Carole says she’s not comfortable lying flat.

    We heard a bang and threw ourselves flat on the ground.

    He laid the map out flat on the table.

  2. 2
    music singing or playing musical notes that are slightly lower than they should be

    Brenda has always sung terribly flat.

  3. 3
    informal exactly: used for emphasizing how quickly something is done

    I fell asleep in five seconds flat!

  4. 4
    informal completely

    They turned me down flat.

    flat broke (=having no money at all):

    We were flat broke at the time.

    go flat against something (=completely ignore someone’s authority):

    I warned you not to do it but you went flat against my advice.