nut

A nut is a type of fruit borne by certain flowering plants.
A nut is a type of hardware: a small, often hexagonal piece of metal, with a hole with internal screw thread, to be fitted onto a bolt which is inserted through holes of two or more objects, to attach these objects to each other.
In rock climbing, a nut is a metal wedge used as protection.
In Egyptian mythology, Nut is an alternate spelling for Nuit, (see Nuit).
A nut is a derogative slang term for a crazy person, with the plural "nuts" used to refer to a state of insanity.
A nut is a small strip of hard material used to stop string vibrations on some stringed instruments. It is located at the upper end of a fingerboard and, along with the bridge, defines the vibrating lengths of the strings.
Nut is a slang term for testicle, and also for male ejaculate.
In American English, "nuts" is a benign (i.e. non-obscene) expression of displeasure ("Aww, nuts.").
In community card poker, having the nuts means having pocket cards that cannot be beaten given the current board (community cards).
Nuts is the name of a British weekly men's magazine
In typography, a nut is an en space.

See also: the acronyms NUT and NUTS.

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