adj 额外的，另加的，特别的(more than usual or necessary; additional) [无 comp]：～edition/news 特刊/号外; run～trains on holidays 在假日期间增开列车; give one～song 加唱一首歌; hire～clerks for Christmas 圣诞节期间雇些临时职员; earn～money 赚额外的钱; need～chairs 需要更多的椅子; ask for/demand an～10 per cent/six dollars 提出增加10%/要求再加六美元; without～charge 不另收费; receive～pay for～work 因加班而得到加班费;go into～time (足球赛)进入加时赛;It's nothing～. 没什么了不起的。The basic price of the car is $10，000—the radio is～. 汽车的售价是一万美元——收音机的钱另收。〖同〗 more，further，additional，spare，unnecessary;〖反〗 fewer;

adv (1) 特别地，格外地 (unusually) [无comp]：an～large box of chocolate 特别大的一盒巧克力;～good quality 特优品质; work/try～hard 特别努力地工作/尝试;The children are～quiet today. 孩子们今天格外安静。〖同〗unusually，uncommonly，especially，particularly，remarkably，extraordinarily;

(2) 另(额)外地 (additionally) [无comp]：charge him～for the water 向他额外加收水钱;pay～(for postage) (邮资)另付; be charged～额外收费;〖同〗 additionally;〖反〗 less;

n (1) 额外的东西; 需要另外收费的项目(something extra，or something for which an extra price is charged) [C]：as an～作为附加的部分; without the～s 不包括额外的东西; all the～s with a new car 新车的所有附件; The price includes all your food but coffee is an～. 这个价格包括你的所有食物，但咖啡需另付费。Allowing for～s，the tour will cost $2000. 若把各种额外的费用都算进去的话，这次旅游将需2000美元。

(2) (拍摄电影或电视剧群众场面时雇用的)临时演员(actor hired to play a minor part，as in a crowd scene) [C]：begin one's acting career as an～从一个临时演员开始演艺生涯;need 10，000～s for the battle scene 需要一万名 群众演员来拍摄那个战斗场面;

(3) (报纸的)号外 (special edition of a newspaper) [C]： E～s were rushed out with the news of the King's death. 为报导国王去世的消息而火速发行了号外。

(4) (板球中的) 额外得分 (in cricket，a score or run not made from a hit by the bat) [常pl];

【说明】 当extra作表语时，后面有时需要接to， 如：What he collects in tips is～to his weekly wage. (他接受的小费是周薪之外的收入。)