1. an indehiscent, hard-shelled, one-loculated, one-seeded fruit, such as an acorn or hazelnut.
2. A seed borne within a fruit having a hard shell, as in the peanut, almond, or walnut.
3. the kernel of any of these.
4. slang A crazy or eccentric person.
5. slang an enthusiast; a buff: a movie nut.
6. informal A difficult endeavor or problem: painting the closet was a tough nut to crack.
7. slang the human head.
8. music A ridge of wood at the top of the fingerboard or neck of a stringed instrument, over which the strings pass.
9. music A device at the lower end of the bow for a stringed instrument, used for tightening the hairs.
10. A small block of metal or wood with a central, threaded hole that is designed to fit around and secure a bolt or screw.
11. slang the cost of launching a business venture.
12. slang the operating expenses of a theater, theatrical production, or similar enterprise: "the [theater] has simply failed to attract enough paying customers per week to meet its nut” ( variety).
13. vulgar slang A testicle.
14. to gather or hunt for nuts.

1. A hard-shelled seed.
2. A fastener: a piece of metal, usually square or hexagonal in shape, with a hole through it having machined internal threads, intended to be screwed onto a bolt or other threaded shaft.
3. A crazy person.
4. the head.
5. financial term for monthly expense to keep a venture running.
6. the amount of money necessary to set up some venture; set-up costs.
7. A stash of money owned by an extremely rich investor, sufficient to sustain a high level of consumption if all other money is lost.
8. on string instruments such as guitars and violins, the small piece at the peghead end of the fingerboard that holds the strings at the proper spacing and, in most cases, the proper height.
9. en, a unit of measurement equal to half of the height of the type in use.
10. an extravagantly fashionable young man of the 1910s and 1920s.
11. A testicle.
12. semen, ejaculate.
13. an extreme enthusiast.
14. relating to the nuts, the best possible hand on a given board.
15. to hit deliberately with the head; to headbutt.
16. to ejaculate (semen).

1. 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. A perforated block (usually a small piece of metal), provided with an internal or female screw thread, used on a bolt, or screw, for tightening or holding something, or for transmitting motion. see Illust. of 1st bolt.
3. the tumbler of a gunlock.
4. A projection on each side of the shank of an anchor, to secure the stock in place.
5. testicles.
6. to gather nuts.

1. to gather nuts: used especially in the present participle.
2. the fruit of certain trees and shrubs which have the seed inclosed in a bony, woody, or leathery covering, not opening when ripe.
3. in machinery, some small part supposed in some way to resemble a nut.
4. same as chestnut-coal.
5. plural something especially agreeable or enjoyable.
6. plural the testicles.
7. A cup made of the shell of a cocoanut or some other nut, often mounted in silver.
8. A bulbous plant, iris Sisyrinchium, of southern europe.
9. loosely, a similar vegetable product, as a tuberous root (earth-nut, ground-nut), leguminous pod (peanut), or seed(physic-nut).
10. in general, the lower end or heel of the bow: opposed to point or head.
11. in australia:
12. see the extract.
13. A daredevil.

1. egyptian goddess of the sky
2. someone who is so ardently devoted to something that it resembles an addiction
3. gather nuts
4. usually large hard-shelled seed
5. a small (usually square or hexagonal) metal block with internal screw thread to be fitted onto a bolt
6. half the width of an em
7. a whimsically eccentric person
8. one of the two male reproductive glands that produce spermatozoa and secrete androgens