1. make shorter, abbreviate, cut, truncate; become shorter; add shortening, add butter or other fat. shorten\short"en\, v. i. to become short or shorter; as, the day shortens in northern latitudes from june to december; a metallic rod shortens by cold.shorten \short"en\ , v. t. [imp. & p. p. shortened ; p. pr. & vb. n. shortening.] [see:
short, a.].
2. to make short or shorter in measure, extent, or time; as, to shorten distance; to shorten a road; to shorten days of calamity.
3. to reduce or diminish in amount, quantity, or extent; to lessen; to abridge; to curtail; to contract; as, to shorten work, an allowance of food, etc. here, where the subject is so fruitful, i am shortened by my chain.
4. to make deficient (as to); to deprive; -- with of. spoiled of his nose, and shortened of his ears.
5. to make short or friable, as pastry, with butter, lard, pot liquor, or the like.
6. To make short or shorter in measure, extent, or time; as, to shorten distance; to shorten a road; to shorten days of calamity.
7. To reduce or diminish in amount, quantity, or extent; to lessen; to abridge; to curtail; to contract; as, to shorten work, an allowance of food, etc.
8. To make deficient ; to deprive; with of.
9. To make short or friable, as pastry, with butter, lard, pot liquor, or the like.
10. To become short or shorter; as, the day shortens in northern latitudes from June to December; a metallic rod shortens by cold. become short or shorter; "In winter, the days shorten" make shorter than originally intended; reduce or retrench in length or duration; "He shortened his trip due to illness" make short or shorter; "shorten the skirt"; "shorten the rope by a few inches".
11. 1. If you shorten an event or the length of time that something lasts, or if it shortens, it does not last as long as it would otherwise do or as it used to do. Smoking can shorten your life When the days shorten in winter some people suffer depression. ¡Ù lengthen.
12. If you shorten an object or if it shortens, it becomes smaller in length. Her father paid £1,000 for an operation to shorten her nose As they shorten, cells become more prone to disease and death. ¡Ù lengthen.
13. If you shorten a name or other word, you change it by removing some of the letters. Originally called Lili, she eventually shortened her name to Lee.
14. to shorten the odds: see:
odds. to become shorter or make something shorter  lengthen.