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mad

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adjective American English pronunciation: mad /mæd/ 
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adjectivemad
comparativemadder
superlativemaddest
  1. 1
    [never before noun] informal angry

    He makes me mad, the way he keeps criticizing me.

    mad at/with:

    My boss is mad at me for missing the meeting.

  2. 2
    mainly British very silly or stupid
    be mad to do something:

    You're mad to spend so much money on clothes.

  3. 3
    done quickly or without thinking, in a way that is badly organized

    There were people everywhere – it was all a bit mad!

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major on (doing) sth

to have or do a lot of something; to focus on a particular thing

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