—nut /nʌt/
noun (PERSON)
F0 [C] INFORMAL OR OFFENSIVE a person who behaves in a very silly, stupid, or strange way or an offensive term for a person who is mentally ill:
» What kind of nut would leave a car on a railway track?Thesaurus+: ↑Of unsound mind , ↑Stupid and sillyThesaurus+: ↑Stupid and silly peopleF0 [C] INFORMAL someone who is extremely enthusiastic about a particular activity or thing:
» Ian's a tennis nut - he plays every day.→ SEE ALSO NUTS(Cf. ↑nuts) adjectiveThesaurus+: ↑Enthusiasts , ↑Admirersnoun [C] (FOOD)
► B2 the dry fruit of particular trees that grows in a hard shell and can often be eaten: » a Brazil/cashew nut» Sprinkle some roasted chopped nuts on top.Thesaurus+: ↑Fruits and seeds and their partsThesaurus+: ↑Types of edible nut• • •
Extra Examples:» He cracked (open) the nuts with his hands.» "I'm allergic to nuts." "So is my brother."» Squirrels store (up) nuts for the winter.» Vegans get all the protein they need from nuts, seeds, beans and cereals.» These nuts are addictive - I can't stop eating them.noun [C] (METAL OBJECT)
► F0 a small piece of metal with a hole in it through which you put a bolt: » Nuts and bolts are used to hold pieces of machinery together.See picture: nut 
Thesaurus+: ↑Nuts, bolts and screws
noun [C] SLANG (HEAD)
► F0 a person's head: » Come on, use your nut (= think clearly)!Thesaurus+: ↑The headnoun [U] US INFORMAL (MONEY)
► F0 the amount of money necessary to operate a business or cover your costs: » With two houses, three cars and child-support payments, he just couldn't meet his nut, even with a second job.Thesaurus+: ↑General words for amounts of money , ↑Large amounts of money , ↑Small amounts of moneyverb [T] INFORMAL ↑Verb Endings for nut
► F0 to hit someone or something with your head: » The guy turned round and nutted him.Thesaurus+: ↑Hitting and beating , ↑Punishing by causing pain