Definition of "dum"

dum¹

/dʌm/

adjective
not comparable
1. (India, cooking) cooked with steam

dum²

/dʌm/

interjection
1. Syllable used when humming a tune.
  Quotations
  I like to hang out with friends and travel the world. But if there's one thing I really love, it's Doctor Who. Dum de dum, dum de dum, dum de dum. Whooo-eee-oooo dum de dum, de dum de dum.
  2012, Graeme Burk, Robert Smith, Who is the Doctor

dum³

/dʌm/

adjective
1. (nonstandard, humorous) Alternative spelling of dumb.

dum⁴

/dʌm/

adjective
not comparable
1. Pronunciation spelling of damn.