n.

1. 印章，图章，印信；玺
   a contract under the president's hand and seal

   由董事长亲自签名盖章的合同

   He affixed his seal to the document.

   他在文件上盖了印。

2. 封（印）；封印纸
   The envelope's seal was torn open.

   信封封缄被人撕开了。

3. 封条；（装饰用的）贴纸
   The seal on the jar was broken.

   瓶子的封口被打开了。

4. 保证；批准；誓约
   put the seal of approval on a scheme

   批准某一方案

5. 象征；标志
   Their handshake was a seal of friendship.

   他们的握手是友谊的象征。

6. 【机】密封垫；密封物；密封装置

vt.

1. 封，密封 [（+up）]
   He signed and sealed the document.

   他在文件上签字加封。

   She forgot to seal her letter before mailing it.

   她忘记在寄信前将信封上。

2. 盖章，盖印于
   The treaty was signed and sealed by both governments.

   条约已经由两国政府签字盖章。

3. （以盖章的方式）保证；确认；批准
   They sealed the bargain with a handshake.

   他们握手成交。

4. 密闭，闭紧；钉住
   His lips were sealed by a promise.

   他的嘴被他的诺言封住了。

   The tube is sealed at both ends.

   这管子两端是密封的。

5. 确定；决定；注定 [（+by/with）]
   The judge's words sealed the prisoner's fate.

   法官的话决定了这个囚犯的命运。

6. 【电】使（插头与插孔等）紧密接触
7. 填塞；充填

n.

1. 【动】海豹[C]
2. 海豹（毛）皮[U]

vi.

1. 捕海豹

n.

1. a device or substance used to join two things together or render something impervious.
   ▸the state or fact of being joined or rendered impervious with a seal.
2. a piece of wax, lead, etc. with an individual design stamped into it, attached to a document as a guarantee of authenticity.
   ▸a design embossed in paper for this purpose.
   ▸an engraved device used for stamping a seal.
   ▸a decorative adhesive stamp.
3. a confirmation or guarantee:
   a seal of approval.
4. (the seal or the seal of the confessional) the obligation on a priest not to divulge anything said during confession.
5. the water standing in the trap of a drain to prevent foul air from rising.

v.

1. fasten or close securely.
   ▸ (seal something off) isolate an area by preventing or monitoring access to and from it.
2. apply a non-porous coating to (a surface) to make it impervious.
3. conclude, establish, or secure definitively:
   victory was sealed.
4. authenticate (a document) with a seal.

n.

a fish-eating aquatic mammal with a streamlined body and feet developed as flippers. [Families Phocidae (the true seals) and Otariidae (eared seals): many species.]

v.

[usu. as noun sealing] hunt for seals.