Thesaurus: brain

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1. n. The whitish mass of soft matter (the center of the nervous system, and the seat of consciousness and volition) which is inclosed in the cartilaginous or bony cranium of vertebrate animals. It is simply the anterior termination of the spinal cord, and is developed from three embryonic vesicles, whose cavities are connected with the central canal of the cord; the cavities of the vesicles become the central cavities, or ventricles, and the walls thicken unequally and become the three segments, the fore-, mid-, and hind-brain.
2. n. The anterior or cephalic ganglion in insects and other invertebrates.
3. n. The organ or seat of intellect; hence, the understanding.
4. n. The affections; fancy; imagination.
5. v. t. To dash out the brains of; to kill by beating out the brains. Hence, Fig.: To destroy; to put an end to; to defeat.
6. v. t. To conceive; to understand.
7. n. that part of the central nervous system that includes all the higher nervous centers; enclosed within the skull; continuous with the spinal cord
8. n. mental ability
9. n. that which is responsible for one's thoughts, feelings, and conscious brain functions; the seat of the faculty of reason
10. n. someone who has exceptional intellectual ability and originality
11. n. the brain of certain animals used as meat
12. v. hit on the head