Definition of fill someone in in English:

fill someone in

phrasal verb

  • 1Inform someone more fully of a matter.

    ‘they filled me in on all the latest news from Cambridge’
    • ‘Josh filled Jason in on what he missed and Jason in exchange informed him of what happened with him.’
    • ‘Seriously, somebody fill me in here.’
    • ‘Andy has been a great help around the area filling us in with a lot of information about Ireland as well as the area.’
    • ‘I have the slightest clue what he is talking about, can you fill me in?’
    • ‘Even though dispatch fills you in on the situation as they know it, they are often wrong, because the person who called the problem in doesn't know what they are talking about.’
    • ‘He filled me in with some interesting pieces of information I hadn't been aware of.’
    • ‘Nora invited Amanda to the sitting room for tea, and filled her in on how the commune worked, and that no profits were made, but everything was paid for.’
    • ‘When Steve fully awoke, Shield filled him in on the details.’
    • ‘The biographer of one of our biggest stars fills us in on a big star who lived large and died broke.’
    • ‘Can anyone fill me in on these important matters.’
    inform of, advise of, tell about, notify of, acquaint with, apprise of, brief on, enlighten about, update with, bring up to date about, make conversant with, report to about
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  • 2British dated, informal Hit or punch someone.

    ‘I filled in a chap and took his money’
    • ‘I filled in a chap and took his money.’