​. enlarge image · ​. brains · ​[uncountable, countable, usually plural] the ability to learn quickly and think about things in a logical and intelligent way. It ...

to think very hard or for a long time about something She racked her brains, trying to remember exactly what she had said. See brain in the Oxford Advanced ...

to hit a person or an animal very hard on the head I almost brained myself on that low beam. Take your English to the next level. The Oxford Learner's Thesaurus ...

The earliest known use of the noun brain is in the Old English period (pre-1150). brain is a word inherited from Germanic. See etymology. Nearby entries. braie ...

​brain somebody/something/yourself to kill a person or an animal by hitting them very hard on the head. I nearly brained myself on that low beam.

​the right side of the human brain, that is thought to be used for creating new ideas and to be where emotions come from compare left brain.

the right side of the human brain, which is thought to be used for creating new ideas and to be where emotions come from compare left brain.

brain-dead · ​suffering from serious damage to the brain and needing machines to stay alive. Doctors declared her clinically brain-dead. Questions about grammar ...

a very intelligent person, especially one who has spent a lot of time studying: We have the best brains in the land working ...

​the movement of highly skilled and qualified people to a country where they can work in better conditions and earn more money. a brain drain to the US.