Definition: deprived of color
Usage: colors dulled by too much sun; greyed with the dust of the road
Similar words: colorless, colourless
Definition: weak in color; not colorful
Definition: made dull or blunt
Similar words: dull
Definition: not having a sharp edge or point
Usage: the knife was too dull to be of any use
Definition: having lost or been caused to lose interest because of overexposure
Usage: the mind of the audience is becoming dulled; the benumbed intellectual faculties can no longer respond
Similar words: uninterested
Definition: not having or showing interest
Usage: an uninterested spectator