To obscure or sully (a thing) with something which detracts from its fairness or beauty.To sully; stain; blemish: as, to blur one's reputation.To obscure without quite effacing; render indistinct; confuse and bedim, as the outlines of a figure.To dim the perception or susceptibility of; make dull or insensible to impression: as, blurred eyesight; to blur the judgment.To make blurs in writing.n. A smudge or smear, such as that made by brushing writing or painting before it is dry; a blot which partially defaces or obscures.n. Figuratively, a blot, stain, or injury affecting character, reputation, and the like.n. A blurred condition; a dim, confused appearance; indistinctness.