- Noun. A shortened or contracted form of a word or phrase, used to represent the whole: ''Dr''.
- Noun. The act or result of shortening or reducing.
- Noun. (music) One or more dashes through the stem of a note, dividing it respectively into quavers, semiquavers, demisemiquavers, or hemidemisemiquavers.
- Noun. (mathematics) Reduction to lower terms, as a fraction.