n (1)记(符)号(mark，symbol，etc used to represent a known meaning)[C]：the～s for add，subtract，multiply and divide 加减乘除的运算符号;the mathematical～s 数学符号;the minus/multiplication～减/乘号;～s of military rank 军衔的标记;as a～of danger 作为危险的标志;〖同〗mark，symbol，figure;

(2)(招，标，指示)牌(notice set up to give information，direction，warning， etc)[C]：a road-/shop-/pub-～路牌/商店招牌/酒店招牌;traffic/road～s 交通标志;hang a～on the door 门上挂一个指示牌;The～says，“No Admittance!” 牌子上写着“严禁入内!”〖同〗signboard，signpost，guidepost;

(3)(手，头等的)示意动作，手势;信号(movement or gesture (of one's hand，head，etc) used to mean or represent sth)[C]：put one's finger to one's lips as a～to be quiet 把手指放到唇边示意要安静;the～of the cross划十字;give the go-ahead～发出准许的信号;give sb a～to leave示意某人离开;make a～to sb to keep still 示意某人保持安静;The winner made a thumbs-up～. 获胜者翘起拇指表示胜利。～language 手势语;〖同〗signal，motion，gesture;

(4)迹象，征兆(sth suggesting that sth or sb is present or exist or sth is about to happen)[C][N (of)]：a～of heart disease 心脏病的征兆;～s of improvement/sales increasing 改善/销售增长的迹象;no～s of life 无生命的迹象;show～s of being tired 显出疲劳的迹象;Tom gave no～whether he agreed or disagreed. 汤姆没有表示同意或不同意。〖同〗indication;

v (1)做手势，发信号(make a sign;signal)[无pass：D+to+n+that，D+to +n +wh，D+to+n+wh-inf，C+to+n+to-inf，C+n+inf]：～to sb that it is time to go to work 对某人做手势示意该上班了;～to sb where to park his car 示意某人在哪儿停车;～to sb to stop/be quiet 做手势示意某人停下来/安静;～(for) sb to stop/enter 做手势示意某人停下来/进来;

(2)签字(名)(write one's name on，esp for official purposes)[I，T+n]：S～(your name)here，please. 请在此签字。～one's name on a cheque 在支票上签上自己的名字;～a contract/document 在合同/文件上签字;The treaty was～ed three days ago.条约是三天前签署的。

(3)(签定合同)雇(聘)用，受雇(聘)(engage or be engaged by signing a contract)[I，I+prep (for/with)，T+n](尤用于体育)：Jack has just～d for/with the local team. 杰克刚刚和地方球队签了约。～three new players 签约聘用三名新球员;

sign away (v adv)签字放弃(vt)：If you～that paper you will be～ing away all your rights. 如果你签署那份文件，你将失去你所有的权利。

sign for (v prep)签收(vt)：Would you please～for this parcel? 请你签收这个包裹好吗?

sign in/out (v adv)签到，登记进入/登记离开(vi & vt)：Every visitor must～in (out) when he enters (leaves) the factory. 每个来访者在进入(离开)工厂时必须登记。Members must～in the guests that they bring to the club. 俱乐部成员必须为他们带来的每一位客人登记。

sign off (v adv) 1)停止工作，解雇(vi)：After ten years，he at last decided to～off and go into business by himself. 10年后，他最终决定辞去工作，自己去经商。 2)签名结束一封信(vi)：I'd better～off now. Love，Mary. 我还是就此搁笔吧。爱你的玛丽。3)结束广播(vi)：It's time to～off for the day;listen again tomorrow. 今天的广播到此结束，明天再会。

sign on/up (v adv)签约雇用(受雇)(vi & vt)：If you join the army you have to～on for at least three years. 如果你参军，你就得至少签约三年。We have been lucky to～on so many experienced workers since we won the government contract. 自从争得了政府的合同以来，我们幸运地和许多熟练工人签了约。

sign on (v adv)登记为失业人员(BrE，infml)(vi)：Have you～ed on this week? 这周你进行失业登记了吗?

sign over (v adv)签字转让(vt)：The building will be～ed over to its new owners on Monday.周一签字后这座大楼将转让给它的新主人。

sign up (for) (v adv)报名参加(vt)：Tom wants to～up for the contest. 汤姆要报名参加比赛。

→′signature n 签字;署名;′signatory n 签约人(国)