The Collaborative International Dictionary of English v.0.48:
colourful \colourful\ adj. same as colorful. [Brit.] [WordNet 1.5 +PJC]WordNet (r) 3.0 (2006):
colourful adj 1: striking in variety and interest; "a colorful period of history"; "a colorful character"; "colorful language" [syn: colorful, colourful] [ant: colorless, colourless] 2: having striking color; "colorful autumn leaves" [syn: colorful, colourful] [ant: colorless, colourless]