slur

from The American Heritage® Dictionary of the English Language, 5th Edition.

• transitive verb To pronounce indistinctly.
• transitive verb To talk about disparagingly or insultingly.
• transitive verb To pass over lightly or carelessly; treat without due consideration.
• transitive verb To glide over (a series of notes) smoothly without a break.
• transitive verb To mark with a slur.
• transitive verb Printing To blur or smear.
• noun A disparaging remark; an aspersion.
• noun A slurred utterance or sound.
• noun A curved line connecting notes on a score to indicate that they are to be played or sung legato.
• noun A passage played or sung in this manner.
• noun Printing A smeared or blurred impression.

from The Century Dictionary.

• noun Mud; especially, thin, washy mud.
• noun A mark or stain; a smear; hence, figuratively, a slight occasion of reproach.
• noun A disparaging or slighting remark; an insinuation; an innuendo: as, he could never speak of him without a slur.
• noun A trick; a cheat. See slur, intransitive verb, 2.
• noun In vocal music, the combination of two or more tones of the music sung to a single syllable.
• noun In musical notation, a curved mark connecting two or more notes that are to be performed to a single syllable, or without break.
• noun . A slide or glide.
• noun In printing, a blurred or doubled impression caused by a shake or uneven motion in the sheet.
• noun In a knitting-machine, mechanism which travels on a bar called the slur-bar, and depresses the jack-sinkers in succession, sinking a loop of thread between every pair of needles.
• To smear; soil by smearing with something; sully; contaminate; pollute; tarnish: often with over.
• To disparage by insinuation or innuendo; depreciate; calumniate; traduce; asperse; speak slightingly of.
• To pass lightly (over or through); treat lightly or slightingly; make little of: commonly with over.
• To cheat, originally by slipping or sliding a die in a particular way: an old gambling term; hence, to trick or cheat in general.
• To do (anything) in a careless manner; render obscure or indistinct by running together, as words in speaking.
• 6, In music, to sing (two or more tones) to a single syllable, or perform in a legato manner. See slur, n., 4.
• In printing, to blur or double, as an impression from type; mackle.
• To slide; be moved or dragged along in a shuffling, negligent way.
• To practise cheating by slipping a die out of the box so as not to let it turn; hence, to cheat in any way.
• In music, to apply a slur to two or more notes.

from the GNU version of the Collaborative International Dictionary of English.

• transitive verb To soil; to sully; to contaminate; to disgrace.
• transitive verb To disparage; to traduce.
• transitive verb To cover over; to disguise; to conceal; to pass over lightly or with little notice.
• transitive verb rare To cheat, as by sliding a die; to trick.
• transitive verb To pronounce indistinctly.
• transitive verb (Mus.) To sing or perform in a smooth, gliding style; to connect smoothly in performing, as several notes or tones.
• transitive verb (Print.) To blur or double, as an impression from type; to mackle.
• noun A mark or stain; hence, a slight reproach or disgrace; a stigma; a reproachful intimation; an innuendo.
• noun rare A trick played upon a person; an imposition.
• noun (Mus.) A mark, thus [⌢ or ⌣], connecting notes that are to be sung to the same syllable, or made in one continued breath of a wind instrument, or with one stroke of a bow; a tie; a sign of legato.
• noun In knitting machines, a contrivance for depressing the sinkers successively by passing over them.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun An insult or slight.
• noun music A set of notes that are played legato, without separate articulation.
• noun music The symbol indicating a legato passage, written as an arc over the slurred notes (not to be confused with a tie).
• noun obsolete A trick or deception.
• noun In knitting machines, a device for depressing the sinkers successively by passing over them.
• verb To insult or slight.
• verb To run together; to articulate poorly.