1. (v. t.) To render obscure by making the form or outline of confused and uncertain, as by soiling; to smear; to make indistinct and confused; as, to blur manuscript by handling it while damp; to blur the impression of a woodcut by an excess of ink.

2. (v. t.) To cause imperfection of vision in; to dim; to darken.

3. (v. t.) To sully; to stain; to blemish, as reputation.

4. (n.) That which obscures without effacing; a stain; a blot, as upon paper or other substance.

5. (n.) A dim, confused appearance; indistinctness of vision; as, to see things with a blur; it was all blur.

6. (n.) A moral stain or blot.

aspersion attaint badge of infamy bar sinister baton becloud bedaub bedim befog bend sinister besmear besmirch besmoke bestain black eye black mark blacken blear bleariness bloodstain blot blotch blur distinctions blurriness brand broad arrow censure champain cloud cloudiness conceal confound confuse dab darken darkness daub defocus deform dim dimness dirty discolor disorder disparagement distort efface eyesore faintness feebleness film filminess fleck flick flyspeck fog fog up fogginess fuzz fuzziness half-visibility haze haziness hide imputation indefiniteness indistinctness indistinguishability jumble jumble together lose resolution low profile macula maculation macule mark mark of Cain mask mess up mist mistiness mix muddle muddy obfuscate obscure obscurity odium onus overlook distinctions pale paleness patch pillorying point champain reflection reprimand reproach scorch sear semivisibility shadowiness singe slubber slur smear smirch smoke smouch smudge smut smutch soft focus soften soil spatter speck speckle splash splatter splotch spot stain stigma stigmatism stigmatization stigmatize taint tar tarnish tumble uncertainty unclearness unform unplainness unshape vague appearance vagueness veil weaken weakness