(1):
(n.) Something contracted or abbreviated, as a word or phrase; - as, plenipo for plenipotentiary; crim. con. for criminal conversation, etc.
(2):
(n.) The act or process of contracting, shortening, or shrinking; the state of being contracted; as, contraction of the heart, of the pupil of the eye, or of a tendion; the contraction produced by cold.
(3):
(n.) The process of shortening an operation.
(4):
(n.) The act of incurring or becoming subject to, as liabilities, obligation, debts, etc.; the process of becoming subject to; as, the contraction of a disease.
(5):
(n.) The shortening of a word, or of two words, by the omission of a letter or letters, or by reducing two or more vowels or syllables to one; as, ne'er for never; can't for can not; don't for do not; it's for it is.
(6):
(n.) A marriage contract.