Definition of colourless adjective from the Oxford Advanced Learner's Dictionary



    (especially US English colorless) adjective
    BrE BrE//ˈkʌlələs//
    ; NAmE NAmE//ˈkʌlərləs//
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  1. 1without colour or very pale a colourless liquid like water colourless lips
  2. 2not interesting synonym dull a colourless personality
  3. Extra examples a clear, almost colourless liquid a rather colourless personality ‘I suppose so,’ she said in a colourless voice. He was a small, colourless man who worked as a clerk. Her illness had left her face deathly white and her lips colourless. The Christian Democrats had a colourless leader. The reaction will produce a colourless liquid. Too many passive verbs make for flabby, colourless prose. Water is a colourless compound of hydrogen and oxygen.
See the Oxford Advanced American Dictionary entry: colourless