Other spellings (US) colorless Word parts colour + -less Pronunciation (UK) IPA (key): /ˈkʌlə(r).ləs/ SAMPA: /"kVl@(r).l@s/ Audio (US)(file) Hyphenation: col‧our‧less Adjective Positive colourless Comparative more colourless Superlative most colourless Something that has no colour, and is almost invisible Air is colourless, which is why we can see through it. Water is normally a colourless liquid.Wikiwand - on Seamless Wikipedia browsing. On steroids.Remove ads