1. A mark or stain; hence, a slight reproach or disgrace; a stigma; a reproachful intimation; an innuendo. Gaining to his name a lasting slur.
2. A trick played upon a person; an imposition.
3. A mark, thus [<upslur/ or <downslur/], 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.
4. In knitting machines, a contrivance for depressing the sinkers successively by passing over them.