Duller

Duller is the comparative form of the adjective dull. It is used to describe something that is less sharp, less bright, or less interesting than another object, person, or situation. The sense can apply to physical objects, sensory experiences, or abstract qualities such as mood or attention.

In practical terms, duller can refer to an edge that has lost its sharpness, a color that is less vivid, or a sound that is less clear or resonant. It can also describe a more monotonous or tedious situation or reaction, as in a sentence like, “The lecture grew duller as the hour wore on.”

Etymology: dull originates from Old English dol, with related forms in other Germanic languages; the comparative is formed by adding -er. The word has long carried meanings related to a lack of sharpness, brightness, or liveliness.

Usage notes: Duller is a straightforward comparative and does not inherently convey whether the change is positive or negative. Context determines the evaluation. It can pair with adjectives for color, light, sound, or mood (for example, duller color, duller sound, duller mood).

See also: dull, dullness, insipid, tedious, boring.