- without colour
- lacking in interest: a colourless individual
- grey or pallid in tone or hue
- without prejudice; neutral
Collins Concise English Dictionary © HarperCollins Publishers::
colourless, US colorless /ˈkʌləlɪs/ adj
col•or•less /ˈkʌlɚlɪs/USA pronunciation
adj.
col•or•less•ness, n. [uncountable]
WordReference Random House Unabridged Dictionary of American English © 2026- without color:[sometimes: after a noun]socks colorless from too many washings.
- pale;
pallid;
dull in color: a colorless complexion. - lacking liveliness or excitement;
dull;
uninteresting:He has a colorless personality.
col•or•less•ness, n. [uncountable]
col•or•less
(kul′ər lis),USA pronunciation adj.
col′or•less•ly, adv.
col′or•less•ness, n.
- without color:Pure water is colorless.
- pallid;
dull in color:a colorless complexion. - lacking vividness or distinctive character;
dull;
insipid:a colorless description of the parade. - unbiased;
neutral.
- 1350–1400; Middle English; see color, -less
col′or•less•ness, n.
- 3. . unexciting, dreary, drab, lackluster.
'colourless' also found in these entries (note: many are not synonyms or translations):
acetal
- acetaldehyde
- acetic acid
- acetone
- acetylene
- acridine
- acrolein
- acrylic acid
- albite
- alcohol
- alum
- aluminium oxide
- ammonia
- amphetamine
- amyl alcohol
- aniline
- anthracene
- antimony potassium tartrate
- argon
- barite
- barytes
- benzene
- bleach
- boron
- butadiene
- butane
- butanol
- butanone
- calcite
- calomel
- carbon dioxide
- carbon monoxide
- carbon tetrachloride
- castor oil
- cetane
- Chile saltpetre
- chloral
- chloral hydrate
- choline
- Cointreau
- collodion
- creosol
- creosote
- crepe rubber
- cryolite
- cyanic acid
- cyanogen
- cyclohexanone
- cyclopentadiene