n (1)数(目);号码(symbol or word showing a quantity of units;numeral)[C]：The～s 6 and 3 are factors of 18. 3和6都是18的因数。3 and 5 are odd～s and 2 and 4 are even～s. 3和5是奇数，2和4是偶数。 Would you like to leave your telephone～? 请你留下电话号码好吗? He knew the room～. 他知道房间号。〖同〗figure，symbol;

(2)数量;总数(quantity or amount) (用单数或复数形式，作主语时若前面有形容词，动词用复数形式)：The～of tourists to that place is limited. 去那地方旅游的人数有限制。The～of students absent is 6. 缺席的学生共六人。There are a million camels in India and the～is growing.印度有上百万头骆驼，而且数量还在增加。A large～of people have refused to come. 许多人都拒绝来。〖同〗amount，quantity，sum，total;

(3)一群(些)人(a specified or recognized set，class，or group)(fml)[C，sing]：She was not of/among their～. 她不是他们那样的人/那一伙里的。One of their～refuses to work for the very low wages that are offered to them. 他们一伙中的一个嫌给的工资太低拒绝去工作。

(4)(abbrs No，no;AmE symb #)[C] (用于数字前表示序号)：Mary lives at No 4 Wood Street. 玛莉住在伍德大街4号。I wear～8 shoes. 我穿8号的鞋子。Then I caught the N～10 trolley bus to the Catholic church. 后来我乘10路无轨电车去了天主教堂。

(5)(报刊等的)期，册(an issue of periodical or serial publication)[C]：(the) back/inaugural/latest/special/current～of “Punch” 过期的《笨拙》周刊/《笨拙》周刊的创刊号/最近一期的《笨拙》周刊/《笨拙》周刊的特刊号/本期的《笨拙》周刊;Have you yesterday's～of The Thames? 你有昨天的《泰晤士报》吗?

(6)一个(节目) (a single item in a programme)[C]：a song/ballroom～一支歌/舞曲;She had several～s in the second act. 她在第二幕中有几场戏。For her third～she played a nocturne.她演奏的第三个节目是小夜曲。

(7)(语法上的)数(a difference of form showing whether only one person or thing is meant，or more than one)[U]：“Men”(“Man”) is plural (singular) in～. men(man)是复(单)数。The most important type of concord in English is concord of～between subject and verb. 英语中最重要的一致关系就是主语和动词在数上的一致。

(8)展示的物品(an item of merchandise on show，usu，of clothing)[C，sing](前面有形容词)：a snappy little green～一件漂亮的绿色短上衣;That new Ford is a fast little～. 那辆新福特汽车是一种高速小车。

(9)算术(arithmetic)[pl]：I'm not good at～s. 我不擅长算术。He doesn't like～s. 他不喜欢算术。

by numbers 1)靠数目大;靠人多：We lost the tug-of-war，but they won by～s. 拨河比赛我们是输了，但他们是靠人多取胜的。2)分开地：drill movement by～s 分开操练动作; 3)系统地;按常规地;机械地：reading by～s 机械地阅读;

have got sb's number(sl) 知道……的底细：I used to think he was a friend of mine，but now I've got his～. 我以前一直认为他是我的朋友，但现在我看透他了。

sb's number is up(sl) 某人的死期已到：If her friends find out the bad things she has said about them，her～is up!如果她的朋友们知道了她说他们的那些坏话，她就死定了。

number one(infml) 1)自己;本人：He is always looking out for～one. 他总是谋求自身利益。2)头号(等)的：He is America's～one golfer. 他是美国高尔夫球的顶尖高手。

vt (1)编号(give a number to sb/sth)[T+n，T+n+prep]：Have you～ed the pages? 你编页码了吗? We were all～ed as we went in. 我们进去的时候都被编了号。Let's～them from 1 to 20. 让我们从1到20给他们编上号。Can you～from one to ten in French? 你能用法语从1数到10吗?〖同〗numerate，reckon，count，calculate;〖反〗lump，mass;

(2)计有;总共(add up to，be a total of，altogether)[T+n/prep]：We～ed fifty in all. 我们总共50人。The complaints we received can be～ed in the thousands. 我们收到的控告累计有数千起。

number sb/sth among sth 把……算作;计入;包括：I～George among my very best friends.我把乔治看成是我最好的朋友之一。

number off (军事)报数：The soldiers～ed off from left to right. 战士们从左向右报数。

→′numberless adj 数不清的;out′number v 数量上胜过;多于;′unn′umbered adj未计数的;无数的;

【辨异】number和sum都指总计。number用于表示计算和估计的结果，它着眼于总计中人或物的个体，如：a number of items on the agenda (议事日程上的许多项目)。sum表示相加的结果，它更强调总数，如：a large sum of money (一大笔钱)。