n (1)监视(听，控)器(device，used to observe，record or test sth)[C]：an air～大气污染记录器;a TV/heart/picture/remote～电视监视器/心脏监视器/图像监视器/远距离监测器;a 21-inch colour～一台21英寸彩色显示器;The patients are connected to the～.病人通过监视器进行监护。

(2)级(班)长，学生干部(pupil who has special jobs to do for the teacher in school)[C]：the homework/dinner money/library～s 家庭作业收发代表/餐费收款员/协助图书管理工作的级长;

(3)监听境外广播者(person who listens to and reports on foreign radio broadcasts and signals);

vt (1)监视(控)(watch sth carefully for a period of time)[T+n]：～the results/patient's conditions/the child's progress carefully密切监视结果/病人的情况/孩子的进步;

(2)监听(listen to and record sounds，esp foreign radio broadcasts and signals)[T+n]：～BBC broadcasts/radiotelephone messages out of Hawaii监听BBC广播/从夏威夷发出的无线电话的通话