| brain | |
| 1. n. (topics, en, Organs) The control center of the central nervous system of an animal located in the skull which is responsible for perception, cognition, attention, memory, emotion, and action. | |
| 2. n. (informal) An intelligent person. | |
| He was a total brain. | |
| 3. n. (plurale tantum) A person who provides the intelligence required for something. | |
| He is the brains behind the scheme. | |
| 4. n. (in the plural) Intellect. | |
| He has a lot of brains. | |
| 5. n. (singular) An intellectual or mental capacity. | |
| Gerald always acts like he doesn't have a brain. | |
| 6. n. By analogy with a human brain, the part of a machine or computer that performs calculations. | |
| The computer's brain is capable of millions of calculations a second. | |
| 7. n. (slang) oral sex | |
| 8. v. (topics, en, Violence) To dash out the brains of; to kill by smashing the skull. | |
| 9. v. (topics, en, Violence) (transitive, slang) To strike (someone) on the head. | |
| 10. v. (transitive, figurative) To destroy; to put an end to. | |
| 11. v. (transitive, obsolete) To conceive in the mind; to understand. | |
