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Definition of brain noun from the Oxford Advanced Learner's Dictionary

brain

noun
 
/breɪn/
 
/breɪn/
Idioms
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    in head

  1. [countable] the organ inside the head that controls movement, thought, memory and feeling
    • The human brain is a complex organ.
    • My tired brain couldn't cope with such a complex problem.
    • She was found to have sustained a brain injury.
    • brain cells/tissue
    • a brain tumour/haemorrhage/aneurysm
    • Sometimes the doctor will also do a brain scan.
    • brain surgery
    Extra Examples
    • He had a brain scan to search for possible damage.
    • He was found to have a blood clot on his brain.
    • His brain reeled as he realized the implication of his dismissal.
    • The left brain controls the right-hand side of the body.
    • The stopping distance includes the time taken for the brain to register the need to stop.
    • Electrodes were used to measure brain activity during sleep.
    • Fruit eating primates have relatively larger brains than those that eat leaves.
    • We want to halve stillbirths and brain injuries in newborns in the next five years.
    • She died of a brain tumour.
    • a device to measure brain activity during sleep
    • There has been some loss of brain function.
    • She is one of the country's leading brain surgeons.
    • The scan apparently showed no damage to the brain.
    Topics Bodya2
    Oxford Collocations Dictionaryadjective
    • human
    • left
    • right
    brain + noun
    • cell
    • tissue
    • region
    preposition
    • in the/​your brain
    • on the/​your brain
    phrases
    • blow your brains out
    See full entry
  2. food

  3. brains
    [plural] the brain of an animal, eaten as food
    • sheep’s brains
  4. intelligence

  5. [uncountable, countable, usually plural] the ability to learn quickly and think about things in a logical and intelligent way
    • It doesn't take much brain to work out that both stories can't be true.
    • Teachers spotted that he had a good brain at an early age.
    • You need brains as well as brawn (= intelligence as well as strength) to do this job.
    see also no-brainer
    Extra Examples
    • She has a good brain for mathematics.
    • Jack's got the brain to realize that the money won't last forever.
    • They relied on brains rather than brawn.
    • She must have inherited her mother's brains.
    • It's important to keep your brain ticking over.
    Oxford Collocations Dictionaryadjective
    • fertile
    • fine
    • good
    verb + brain
    • rack
    • pick somebody’s
    • take
    brain + verb
    • function
    • tick over
    • work
    brain + noun
    • power
    • drain
    preposition
    • brain behind
    phrases
    • brains, not brawn
    • etc.
    • have a brain for something
    See full entry
  6. intelligent person

  7. [countable, usually plural] (informal) an intelligent person
    • one of the best scientific brains in the country
    • We have the best scientific brains in the country working on this.
  8. the brains
    [singular] the most intelligent person in a particular group; the person who is responsible for thinking of and organizing something
    • He's always been the brains of the family.
    • the brains behind something The band's drummer is the brains behind their latest venture.
    • He was the brains behind the robberies.
    Oxford Collocations Dictionaryadjective
    • fertile
    • fine
    • good
    verb + brain
    • rack
    • pick somebody’s
    • take
    brain + verb
    • function
    • tick over
    • work
    brain + noun
    • power
    • drain
    preposition
    • brain behind
    phrases
    • brains, not brawn
    • etc.
    • have a brain for something
    See full entry
  9. Word OriginOld English brægen, of West Germanic origin; related to Dutch brein.
Idioms
beat your brains out
  1. (especially North American English, informal) to think very hard about something for a long time
    • I’ve been beating my brains out all weekend to get this script written.
blow your/somebody’s brains out
  1. to kill yourself/somebody by shooting yourself/them in the head
    • He put a gun to his head and threatened to blow his brains out.
    • While cleaning his shotgun he had accidentally blown his own brains out.
cudgel your brains
  1. (old-fashioned, British English) to think very hard
    • I had to cudgel my brains to remember her name.
have something on the brain
  1. (informal) to think about something all the time, especially in a way that is annoying
    • She's got football on the brain.
pick somebody’s brains
  1. (informal) to ask somebody a lot of questions about something because they know more about the subject than you do
    • I need to pick your brains: what can you tell me about credit unions?
rack your brain(s)
  1. to think very hard or for a long time about something
    • She racked her brains, trying to remember exactly what she had said.
    • We racked our brains but we couldn't come up with a solution.
See brain in the Oxford Advanced American DictionarySee brain in the Oxford Learner's Dictionary of Academic English
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