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Adjective: colourless  kú-lu(r)-lus
Usage: Brit, Cdn (US: colorless)
  1. Lacking in variety and interest
    "a colourless and unimaginative person";
    - colorless [US]
  2. Weak in colour; not colourful
    - colorless [US]

See also: achromatic, ashen, blanched, bleached, bloodless, color [US], colour [Brit, Cdn], drab, dull, dulled, etiolate, etiolated, faded, grayed [US], greyed [Brit, Cdn], hebetudinous [rare], livid, lurid, neutral, pale, pallid, pastelike, pastie, pasty, prefaded, sober, somber [US], sombre [Brit, Cdn], vividness, wan, washed-out, washy, waxen, waxlike, waxy, white, whitened

Antonym: colorful [US]

Encyclopedia: Colourless