The word Woo may have a number of meanings:

Wooing is another term for courtship.

Woo is a 1997 comedy film starring Jada Pinkett Smith; see Woo (film).

Woo is one of several transliterations of the Chinese family name Wu; for example, John Woo.

WOO was the radio call sign of the now-defunct AT&T ship-to-shore radiotelephone station in Navesink, New Jersey.

WoO is a term in music for a "work without opus number".

Woo can be a general term for joy, in either a realistic or sarcastic manner. For example; "Woo, yay!"