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.

To cause imperfection of vision in; to dim; to darken.

To sully; to stain; to blemish, as reputation.

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

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

A moral stain or blot.

a hazy or indistinct representation; "it happened so fast it was just a blur"; "he tried to clear his head of the whisky fuzz"

become glassy; lose clear vision; "Her eyes glazed over from lack of sleep"

make unclear, indistinct, or blurred; "Her remarks confused the debate"; "Their words obnubilate their intentions"

make dim or indistinct; "The drug blurs my vision"

become vague or indistinct; "The distinction between the two theories blurred"

See Smear, Halo, Ghost.

In painting, the softening of edges of adjacent colors by averaging their color values. Contrast with smear.