n (1) 大脑 (organ of the body in the head， which controls thought， memory and feeling)[C]：The～is enclosed in the skull.大脑包在脑壳里。The～is the centre of the nervous activity/nervous system. 大脑是神经活动/神经系统的中枢。a human～人的大脑;～surgery/concussion/damage/injury/fever/cells脑外科/脑震荡/脑损伤/脑外伤/脑膜炎/脑细胞;a disease of the～脑部疾病;operate on sb's～动开颅手术;blow one's～s out朝头开枪自杀;～(s) trust智囊团;

(2) 智慧，头脑(mind; intelligence; cleverness)[U;C，通常pl]：a man of very little～没什么头脑的人;have no/little/not much～没有/很少有/没什么脑子;He hasn't that kind of～.他没有那种脑子。Use your～! 动脑子! The plan took shape in his～.计划在他头脑中形成。have plenty of～s很有头脑;have～s and courage有勇有谋;have a good/fine～脑子好(智力高);have an excellent～脑子好(智力高);have a very capable business～很有商业头脑;

(3) 聪明人(person with a good mind)[C](infml)：She is one of the best/leading～s in the country. 她是这个国家的精英之一。

(4) 一群人中最聪明者(member of a group who is regarded as its intellectual leader)[pl](接sing v)： She is the～s of the family/the company.她是全家/公司最聪明的人。She is the～s behind the whole scheme.她是整个方案的幕后智囊。Not even the great～s of the university can solve the problem.即使是这所大学里极聪明的人也解决不了这个问题。

have sth on the brain不停地思考某事：The boy has got football on the～most of the time.这男孩多数时间总是想着足球。

→′brainless adj 没头脑的，笨的;′brainy adj 聪明的;′brain-child n 脑力创造物;′brain-drain n 人才流失;′brain-teaser n 难题;′brainwash v 洗脑;′brainwave n 灵机(感);′brainstorm n 脑猝变;突然的精神错乱;brains n [U] 脑浆;

vt 重击脑袋杀死(kill by hitting on the head with great force) [T+n](fig)(infml)：～one's enemy with one blow一下就把敌人的头打碎了;～sb with a hammer 用锤子打碎某人的头; I'll～you if you do that again.你再那样做我就敲碎你的脑袋。

【辨异】brain与mind都可指智力能力。mind是指智慧能力中心(“头脑”)的一般用语，是哲学意义的说法，与具体的body(躯体)相对而言;brain 原是生理学用语，指产生智力能力的机体(大脑)，也可与mind一样指智力能力。