Definition of "wah"

wah¹

/wɑː/

noun
plural wahs
1. (archaic) The red panda.

wah²

/wɑː/

interjection
1. A cry of fright, distress, etc. (especially of an infant or young child)
2. A cry of amazement, delight, etc.
noun
plural wahs
1. (music) wah-wah.

wah³

/wɑː/

interjection
1. (Singlish, Manglish) Wow!; whoa! (expressing surprise or amazement)
  Quotations
  Wah, you quite brave hor...
  2005 October 30, Wong Kim Hoh, The Sunday Times, quoted in Jack Tsen-Ta Lee, A Dictionary of Singlish and Singapore English