- nut [nut]n.[ME nutte < OE hnutu, akin to Ger nuss < IE * kneu-, lump, nut (< base * ken-, to squeeze together) > L nux, MIr cnū]1. the dry, one-seeded fruit of any of various trees or shrubs, consisting of a kernel, often edible, in a hard and woody or tough and leathery shell, more or less separable from the seed itself, as the walnut, pecan, chestnut, acorn, etc.2. the kernel, or meat, of such a fruit3. loosely any hard-shell fruit that will keep more or less indefinitely, as a peanut, almond, etc.4. a small block, usually of metal, with a threaded hole through the center, for screwing onto a bolt, screw, etc.5.a) a ridge of ebony or other hard material at the top of the fingerboard of a stringed instrument, over which the strings passb) the small knob at the end of a violin bow, for tightening or loosening the hairs6. Informal the initial cost of an undertaking, or the amount of money it is necessary to take in before a profit is realized on it7. Slanga) the headb) [pl.] the testicles: a vulgar usage8. Slanga) a foolish, crazy, or eccentric personb) a devotee; fan9. Printing EN (sense 2): See also NUTSvi.nutted, nuttingto hunt for or gather nuts——————hard nut to crack or tough nut to cracka person, problem, or thing difficult to understand or deal with——————off one's nutSlang foolish, silly, or crazy
English World dictionary. V. Neufeldt. 2014.