1. (n.)nut a dry fruit consisting of an edible kernel or meat enclosed in a woody or leathery shell.
2. nut the kernel itself.
3. nut a hard, indehiscent, one-seeded fruit, as the chestnut or the acorn.
4. nut a block, usu. of metal, perforated with a threaded hole so that it can be screwed down on a bolt to hold together objects through which the bolt passes.
5. (noun)crackpot, crank, nut, nut case, fruitcake, screwball a whimsically eccentric person
6. (noun)addict, nut, freak, junkie, junky someone who is so ardently devoted to something that it resembles an addiction "a golf addict"; "a car nut"; "a bodybuilding freak"; "a news junkie"
7. (verb)testis, testicle, orchis, ball, ballock, bollock, nut, egg one of the two male reproductive glands that produce spermatozoa and secrete androgens "she kicked him in the balls and got away"
1. (noun)nut the hard fruit of some trees with an outer shell that you remove before eating almonds, pecans, walnuts and other nuts; to crack a nut
2. nut a circular piece of metal that holds a bolt in place Screw the nut onto the bolt.
3. nut a person you think is slightly crazy Some nut backed his car into us.
4. nut a health/electronics/computer etc. nut sb who is very enthusiastic about health, electronics, etc.
5. nut a tough/hard nut to crack sb or sth that is difficult to understand or deal with Golfers know the course is a tough nut to crack.
6. nut the nuts and bolts the most basic aspects the nuts and bolts of writing reports
Definition of 'NUT'
Webster Dictionary
1. (noun)NUT the fruit of certain trees and shrubs (as of the almond, walnut, hickory, beech, filbert, etc.), consisting of a hard and indehiscent shell inclosing a kernel
2. (noun)NUT a perforated block (usually a small piece of metal), provided with an internal or femalescrew thread, used on a bolt, or screw, for tightening or holding something, or for transmitting motion. See Illust. of lst Bolt