nut

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. A crazy or eccentric person.

5. An enthusiast; a buff: a movie nut.

6. A ridge of wood at the top of the fingerboard or neck of a stringed instrument, over which the strings pass.

7. A device at the lower end of the bow for a stringed instrument, used for tightening the hairs.

8. The cost of launching a business venture.

9. 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).

Slang

1. A crazy or eccentric person.

2. An enthusiast; a buff: a movie nut.

3. A ridge of wood at the top of the fingerboard or neck of a stringed instrument, over which the strings pass.

4. A device at the lower end of the bow for a stringed instrument, used for tightening the hairs.

5. The cost of launching a business venture.

6. 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).

Informal A difficult endeavor or problem: Painting the closet was a tough nut to crack.

Slang The human head.

Music

1. A ridge of wood at the top of the fingerboard or neck of a stringed instrument, over which the strings pass.

2. A device at the lower end of the bow for a stringed instrument, used for tightening the hairs.

3. The cost of launching a business venture.

4. 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).

A small block of metal or wood with a central, threaded hole that is designed to fit around and secure a bolt or screw.

Slang

1. The cost of launching a business venture.

2. 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).

Vulgar Slang A testicle.