Dullest

Dullest is the superlative form of the adjective dull. It is used to describe the highest degree of dullness, in senses such as lack of brightness, lack of interest, or lack of sharpness. For example, a dullest day can be overcast and uneventful, and a dullest lecture is notably boring.

Originating from Old English dol, meaning foolish or slow, dull has developed to cover both sensory and cognitive dullness. The suffix -est marks the superlative degree in English, producing dullest as the form used to compare more than two items.

Dullest commonly appears in descriptive or evaluative contexts that emphasize monotony or lack of appeal. It can describe weather, colors, sounds, or experiences. When applied to people, using dullest to refer to intelligence or personality can be insulting and should be used with care. Related synonyms include tedious, dreary, and monotonous; antonyms include vivid, bright, and lively.

See also dull and dullness. The word is typically informal in everyday usage and appears more often in casual speech or journalistic description than in formal writing.