n (1)守卫，警戒，看守(state of readiness or watchfulness to protect sb/sth against attack)[U]：be on～at the gate/round the tent 在大门口/帐篷周围警戒;keep～over the house 守在房子周围;be under close～处在严密的监视下;a～dog/duty 一只警犬/一项警戒的任务;

(2)防御，准备(position of defence，eg in boxing， fencing)[U]：keep up/drop one's～保持/未做出防御姿势;get through/penetrate sb's～ (fig)突破/突破某人的防御;

(3)卫(哨)兵，警卫(看守)员(person，esp a soldier，a policeman or a prison officer，who guards sb or sth)[C]：a security/museum～保安人员/博物馆看守员;camp/border～s营房哨兵/边防战士;slug a～猛击一名看守员;〖同〗 watchman;

(4) 1)警卫队(group of people，esp soldiers，whose duty is to guard sb/sth)[Gp，the～]：see the changing of the～观看换岗;double the～加双岗;The～are on duty.警卫队在值勤。2)仪仗队(body of persons who form an escort or perform drill exhibitions on ceremonial occasions)[C，Gp]：an honour～检阅仪仗队;

(5)皇家禁卫军，警卫部队(group of special soldiers，originally those who guarded the King or Queen，esp in Britain)[pl]：the Scots～s 苏格兰禁卫队;the Royal Horse G～s 皇家骑兵禁卫队;a G～s officer 禁卫军军官;

(6)列车长(railway official in charge of a train)[C](BrE)(AmE conductor)：The～of the train blew his whistle. 列车长鸣笛。

(7)防护器(物)(sth which serves to prevent injury or loss)[C](尤用于合成词)：a mud-/fire-～挡泥板/防火罩;wear shin/face～s 带护胫/面罩;the～of a sword 击剑用的面罩;wear a helmet as a～against falling rocks 戴上头盔作为一种防护装置抵挡落下的石头;

off/on one's guard 失去/保持戒备;be on one's～against pickpockets/saying the wrong thing 警惕扒手/提防说错话;put sb on sb's～ 使某人措手不及;

stand guard (over sb/sth)站岗，警戒;(soldiers) stand～over the village (士兵们)在村边警戒;(bear mother)～over its injured cub (熊妈妈)在自己受伤的幼兽旁边警戒;

→′guardhouse n卫兵室;′guardrail n 护拦;′guardroom n 卫兵室;禁闭室;′guardman n 禁卫队士兵;

vt(1) 1)防(保)卫，保护(defend，keep safe，esp by watching for danger)[T+n]：～a bank/one's flock 保卫银行/羊群;～one's reputation/one's life (fig) 保护自己的名声/生命;～the house against strangers/an attack 守卫着房子警惕陌生人/进攻;(wall)～the place from thieves(墙)阻挡小偷光顾此地;(quinine)～sb from fever (奎宁)防止某人发烧;〖同〗 protect，shield; 2)看守(keep under close watch in order to prevent escape，misconduct，etc)[T+n]：～the prisoner closely/throughout the trial 严密/在整个审判过程中看守囚犯;～the secret with one's life 用自己的生命严守秘密;

(2)管(控)制(keep under control)[T+n]：～one's temper/one's tongue carefully 小心地控制脾气/言语谨慎;

guard against (v prep)预防，防止(vt)：～against errors/infection/bad habits/passing on disease to one's family 防止犯错误/感染/养成坏习惯/把疾病传给家人;

→′guarded adj(指言论)谨慎的;′guardedly adv 谨慎地;

【辨异】guard 与defend、protect和preserve的区别见DEFEND。