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n (1)圖(印)章，璽(piece of metal，ring，etc often round，with figure，symbol，word，letter，etc used as evidence of a government，university，company，or (esp，in earlier times) a powerful person)[C]：the great～of the United States美國國璽;the～of the King國王御璽;wear a ring with a～bearing one's mark 戴一枚刻有自己標(biāo)志的戒指;stamp one's～to a document 在文件上蓋印章;press one's～into the hot wax 在熱蠟上蓋印章;The solicitor stamped the certificate with his～.律師在證書上蓋上了印章。

(2)(加蓋的)圖(印)章(official mark on a document，sometimes made with wax，which shows that it is legal or has been officially approved)[C]：the letters and documents that bear the～of the King 有國王封印的信件和文件;The～of the United States attached to important government papers.美國重要的政府文件都加蓋國印。〖同〗mark，symbol;

(3)封條(蠟，鉛)，火漆(piece of paper，wax，lead，etc，stamped with some official design fixed to a door，container，or letter，etc)[C]：the～s of a packet/a letter/a drawer包裹上/信件上/抽屜上的封條; tear open (break) the～打開(撕下)封條;the door of the room that is fastened by a metal～ 用金屬封條封好的房間門;

(4)密封物(墊)(sth that seals，closes，or fastens tightly so that gas or fluid cannot enter or escape)[C]：an oil～防油封圈;a rubber/gas/water～(橡)膠封圈/防氣封圈/防水封圈;a～around a window 窗戶四周的密封條;break the～on the jar打開壇子的封口;clean the～of the fridge door regularly定期清潔冰箱門密封條;put a～around the edge of the bath在浴盆周圍放上防漏封圈;

(5)密封(tight closure，as against the passing of air or water)[C]：The door doesn't close tight until it has a good～on it.這門密封好，才能關(guān)得嚴(yán)。

(6)印花帖簽(stamp placed on envelope)[C];

a seal of approval批準(zhǔn)，正式認(rèn)可：giving the drug/the proposal/the deal a～of approval 批準(zhǔn)該藥上市/采納建議/協(xié)議生效;

set the seal on確保完成某事(fml)：The trip set the～on our friendship. 這次旅行奠定了我們的友誼;The meeting set the～on the negotiations. 這次會議為談判成功打下基礎(chǔ)。

put the seal to 同意，批準(zhǔn)：Both the families have put the～to the marriage.雙方家庭都答應(yīng)了這門親事。

vt(1)蓋章(印)(mark with a seal)[T+n]：The treaty/statement was signed and～ed.條約/聲明已簽署蓋印?！玹he document with the King's insignia 在文件上蓋上國王的印璽;〖同〗 certify，confirm，verify，approve;

(2)封住某物(close by any form of fastening(that mustn't be broken before access can be gained))[T+n，T+n+adv (up)]：～the parcel/the bottle (up)封上包裹/封上瓶口;～(up) the letter with sticky tape 用膠帶把信封好;Messages from the king used to be～ed with wax. 國王的信件常用蠟封?！玡d orders 密封的命令;〖同〗fasten;

(3)粘住(信封等) (fix (as if) with glue or other similar substance)[T+n，T+n+adv(down)]：～an envelope down and put a stamp on it把信封粘上，貼上郵票;I put a plastic cover on my book，but I didn't～it down properly and it came off.我給書套上塑封，可沒封住，掉下來了。

(4)將某物密封住(close tightly or put a substance on sth so that gas or fluid cannot enter or escape)[T+n，T+n+adv (up)]：～up a pipe封住管子;～(up) a jar of fruit/a can of food 把裝水果的廣口瓶/食品罐頭密封住;～(up) doors before fumigating 在熏煙消毒前把門都封好;(birds)～(up) the holes (cracks) in the nest with mud(鳥)用泥巴封住巢穴上的孔洞(裂縫);Her lips were～ed by a promise.(fig)她有諾言在先，因而守口如瓶。They tried to～his lips.(fig)他們企圖不讓他走漏一點(diǎn)風(fēng)聲。

(5)填充(滿)，涂蓋密封物(fill up or coat with certain substance)[T+n]：～a leaky wall 填補(bǔ)有裂縫的墻體;～the floor with paint/the hull with paint給地板涂上一層漆/給船身涂上一層漆;

(6)解決(某事)，決定(settle or make certain，decide)[T+n](fml)：～a bargain達(dá)成交易;They～ed the agreement by shaking hands (with a handshake).他們握手表示達(dá)成協(xié)議。This mistake～ed his fate.這一錯(cuò)誤決定了他的命運(yùn)。

seal in(v adv)封住(閉)(vt)：The freshness/flavour will remain～ed in until the tin is opened. 食品的鮮美/食品的味道開聽前一直會保持不變。

seal off (v adv)封鎖(vt)：～off an area/a street封鎖一地區(qū)/一街道;～off all the exits/all the entrances 封鎖所有出口/所有入口;The gas pipe has been～ed off to prevent escapes.煤氣管道被封住，以防泄漏。

seal up 堵塞，封牢：An avalanche of rocks～ed up the cave. 大量崩塌的巖石將洞口堵塞住。

→′sealant n 密封膠，防滲漏劑;′sealed adj蓋章證實(shí)了的，封閉的，無法弄懂的;′sealing-wax n封蠟，火漆