DictionaryAI

nut

NUT/nʌt/

Pluralnuts

25 meanings of nut

Practice

  1. 1
    seed you eatnouncountable
    A hard-shelled seed or dry fruit with an edible kernel, produced by many kinds of plant; in botany, strictly a hard, dry fruit that does not split open to release its single seed.

    She cracked the nut open and ate the kernel inside.

    A bowl of mixed nuts sat on the table beside the cheese.

    Note

    Here nut is a grocer's category rather than a botanist's, wide enough to hold peanuts, cashews, pistachios and Brazil nuts together. Botanists keep the word for the strict, unsplitting fruit, so something that counts as a nut at the table may not count in the lab.

    Checked 2 Nov 2026 · 2 facts

    • A botanical nut is a hard, indehiscent fruit. mobot.org
    • Culinary nuts can fall outside the botanical definition. en.wikipedia.org
  2. 2
    bolt fittingnouncountable
    A piece of hardware, usually metal and hexagonal or square, with an internally threaded hole that screws onto a matching bolt or shaft.

    She fastened a nut onto the threaded rod and tightened it firmly.

    Each bolt needs a nut to hold the bracket in place.

    UsageSay tighten a nut or loosen a nut. The nuts and bolts of something are its practical details.

    Note

    The fastener that works in a pair: the nut carries the inner thread, the bolt the outer one, and tightening one onto the other draws the parts together.

    Checked 2 Nov 2026 · 1 fact

    • A nut has an internal thread that engages a bolt's external thread, fastening parts together. en.wikipedia.org
  3. 3
    crazy personnounslangcountable
    A person regarded as crazy, eccentric, or wildly irrational.

    Everyone thought he was a nut for quitting his job to chase storms.

    She's a bit of a nut, but her wild ideas often work.

    UsageOften a bit of a nut, or like a nut: driving like a nut. Keep it out of talk about mental illness.

    Similarlunatic, loony, psycho, nutcase, nutter

    Note

    A whole family of slang words grows from this sense: nutcase, nutjob, nutbag, nutter, wingnut. Some are written either solid or open (nutcase or nut case, nutjob or nut job).

    Checked 2 Nov 2026 · 1 fact

    • The crazy-person sense of nut has a related slang family including nutcase, nutjob, nutbag, nutter, and wingnut. en.wiktionary.org
  4. 4
    enthusiastnouncolloquialcountable
    A person who is an extreme enthusiast about a particular interest or activity.

    He's a history nut who can name every president in order.

    Being a coffee nut, she roasts her own beans at home.

    UsageAfter the interest: a history nut, a coffee nut, a fitness nut.

    Similarbuff, fanatic, enthusiast, freak

  5. 5
    testiclesnounslangvulgarcountable
    A testicle, especially in coarse or vulgar usage, and frequently used in the plural.

    A sharp kick caught him square in the nuts.

    He joked that he would give his left nut for tickets to the final.

    UsageMostly the nuts: kicked in the nuts. In polite or medical talk, say testicles.

    Similarball, bollock

  6. 6
    guitar partnouncountable
    On stringed instruments like guitars and violins, the small piece at the top of the fingerboard that holds the strings at the correct spacing and height.

    The luthier filed the nut to lower the string height near the headstock.

    A worn nut can cause tuning problems and string buzz.

    Note

    A luthier's word, shared by violins and guitars alike, for the piece at the peghead end of the fingerboard. Its first job is spacing: the strings sit in it at fixed intervals. On most instruments it sets their height too, which is why a nut that is cut too low or worn down shows up in the playing as buzz or poor tuning.

    Checked 31 Oct 2026 · 5 facts

Practice

Can you tell the meanings of nut apart? Answer 3 quick questions from this page, or write your own sentence and AI will check it.

Origins

Meanings 1–16, 18–19

"Nut" comes from Middle English nute or note, from Old English hnutu, going back through Proto-West Germanic and Proto-Germanic *hnuts ("nut"). Its root *knu- may have been shared with Proto-Celtic *knūs and Latin nux ("nut"); because it appears only in Germanic, Celtic, and Italic, some have argued it may come from a non-Indo-European substrate language. Related words include Dutch noot, German Nuss, and Swedish nöt.

Checked 1 Nov 2026 · 4 facts

  • English nut descends through Middle English note or nute and Old English hnutu from Proto-West Germanic and Proto-Germanic *hnuts, meaning nut. en.wiktionary.org
  • The root *knu- may be shared with Proto-Celtic *knūs and Latin nux, meaning nut. en.wiktionary.org
  • The root's restriction to Germanic, Celtic, and Italic has contributed to proposals of a non-Indo-European substrate origin. en.wiktionary.org
  • Dutch noot, German Nuss, and Swedish nöt are related words. en.wiktionary.org
Meaning 17

The Scottish interjection nut, meaning "no," is a variant of not.

Checked 1 Nov 2026 · 1 fact