–adjective

1.	moving or able to move, operate, function, or take effect quickly; quick; swift; rapid: a fast horse; a fast pain reliever; a fast thinker.

2.	done in comparatively little time; taking a comparatively short time: a fast race; fast work.

3.	(of time) a. indicating a time in advance of the correct time, as of a clock. b. noting or according to daylight-saving time.

4.	adapted to, allowing, productive of, or imparting rapid movement: a hull with fast lines; one of the fastest pitchers in baseball.

5.	characterized by unrestrained conduct or lack of moral conventions, esp. in sexual relations; wanton; loose: Some young people in that era were considered fast, if not downright promiscuous.

6.	characterized by hectic activity: leading a fast life.

7.	resistant: acid-fast.

8.	firmly fixed in place; not easily moved; securely attached.

9.	held or caught firmly, so as to be unable to escape or be extricated: an animal fast in a trap.

10.	firmly tied, as a knot.

11.	closed and made secure, as a door, gate, or shutter.

12.	such as to hold securely: to lay fast hold on a thing.

13.	firm in adherence; loyal; devoted: fast friends.

14.	permanent, lasting, or unchangeable: a fast color; a hard and fast rule.

15.	Informal. a. (of money, profits, etc.) made quickly or easily and sometimes deviously: He earned some fast change helping the woman with her luggage. b. cleverly quick and manipulative in making money: a fast operator when it comes to closing a business deal.

16.	Photography. a. (of a lens) able to transmit a relatively large amount of light in a relatively short time. b. (of a film) requiring a relatively short exposure time to attain a given density.

17.	Horse Racing. b63 a. (of a track condition) completely dry. b. (of a track surface) very hard.

–adverb

18.	quickly, swiftly, or rapidly.

19.	in quick succession: Events followed fast upon one another to the crisis.

20.	tightly; firmly: to hold fast.

21.	soundly: fast asleep.

22.	in a wild or dissipated way.

23.	ahead of the correct or announced time.

24.	Archaic. close; near: fast by.

–noun

25.	a fastening for a door, window, or the like.

—Idioms

26.	play fast and loose. play (def. 80).

27.	pull a fast one, Informal. to play an unfair trick; practice deceit: He tried to pull a fast one on us by switching the cards.

–noun

1.	food and drink considered in terms of its qualities, composition, and its effects on health: Milk is a wholesome article of diet.

2.	a particular selection of food, esp. as designed or prescribed to improve a person's physical condition or to prevent or treat a disease: a diet low in sugar.

3.	such a selection or a limitation on the amount a person eats for reducing weight: No pie for me, I'm on a diet.

4.	the foods eaten, as by a particular person or group: The native diet consists of fish and fruit.

5.	food or feed habitually eaten or provided: The rabbits were fed a diet of carrots and lettuce.

6.	anything that is habitually provided or partaken of: Television has given us a steady diet of game shows and soap operas.

–verb (used with object)

7.	to regulate the food of, esp. in order to improve the physical condition.

8.

to feed.

–verb (used without object)

9.	to select or limit the food one eats to improve one's physical condition or to lose weight: I've dieted al 3e8 l month and lost only one pound.

10.	to eat or feed according to the requirements of a diet.

–adjective

11.	suitable for consumption with a weight-reduction diet; dietetic: diet soft drinks.

–noun

1.	a small globular or rounded mass of medicinal substance, usually covered with a hard coating, that is to be swallowed whole.

2.	something unpleasant that has to be accepted or endured: Ingratitude is a bitter pill.

3.	Slang. a tiresomely disagreeable person.

4.	Sports Slang. a ball, esp. a baseball or golf ball.

5.	the pill. birth-control pill.

6.	pills, British Slang. billiards.

–verb (used with object)

7.	to dose with pills.

8.	to form or make into pills.

9.	Slang. to blackball.

–verb (used without object)

10.	to form into small, pill-like balls, as the fuzz on a wool sweater.