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Clockwise from top: T-nut, hex cap nut, wingnut, and hex nut


a. An indehiscent fruit having a single seed enclosed in a hard shell, such as an acorn or hazelnut.
b. The usually edible seed of such a fruit.
c. Any of various other usually edible seeds enclosed in a hard covering such as a seed coat or the stone of a drupe, as in a pine nut, peanut, almond, or walnut.
2. Slang
a. A crazy or eccentric person.
b. An enthusiast; a buff: a movie nut.
3. Informal A difficult endeavor or problem: Painting the closet was a tough nut to crack.
4. Slang The human head.
5. Music
a. A ridge of wood at the top of the fingerboard or neck of a stringed instrument, over which the strings pass.
b. A device at the lower end of the bow for a stringed instrument, used for tightening the hairs.
6. A small block of metal or wood with a central, threaded hole that is designed to fit around and secure a bolt or screw.
7. Slang
a. The cost of launching a business venture.
b. 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).
8. Vulgar Slang A testicle.
intr.v. nut·ted, nut·ting, nuts
1. To gather or hunt for nuts.
2. Vulgar Slang To ejaculate.

[Middle English nute, from Old English hnutu.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


the act or pastime of gathering nuts
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
References in classic literature ?
Up they came, all in good order, laden with the proceeds of a nutting expedition, for they always reported to Rose and paid tribute to their queen in the handsomest manner.
The nutting season for this particular tree nut is August-September in the southern part of its range, September-October most places, and stretching into November in the northern areas.
When nutting for hickory nuts, it is important not to pick up the mockernuts and bitternuts.