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1. Ludicrous, foolish
   - goofy [informal], silly, wacky, whacky
    
2. Like a clown
   "a zany sense of humour";
   - buffoonish, clownish, clownlike

1. A buffoon in one of the old comedies; imitates others for ludicrous effect
    
2. Someone who is a stupid incompetent fool
   - fathead [informal], goof [informal], goofball [N. Amer, informal], bozo [N. Amer, informal], jackass, goose [informal], cuckoo

Derived forms: zanier, zanies, zaniest

See also: daft [Brit, informal], dumb, foolish, humorous, humourous [Brit, Cdn, non-standard], imbecile, imbecilic, stupid

Type of: boofhead [Austral, informal], buffoon, charlie [Brit, informal], clown, diddy [Brit, informal], dill [Austral, NZ, informal], droll [archaic], drongo [Austral, NZ, informal], fool, galah [Austral, informal], goof [informal], goofball [N. Amer, informal], juggins [Brit, informal], jughead [N. Amer, informal], mampara [S.Africa, informal], meathead [informal], merry andrew [archaic], moegoe [S.Africa, informal], muggins [Brit, informal], nit [Brit, informal], sap [N. Amer, informal], tomfool

Encyclopedia: Zany