1. 封住，粘住(信封)
    When you seal an envelope, you close it by folding part of it over and sticking it down, so that it cannot be opened without being torn.

    e.g. He sealed the envelope and put on a stamp...
           他封住信封并贴上一张邮票。
    e.g. Write your letter and seal it in a blank envelope...
           信写好后把它装进空白信封里封好。

2. 封住(容器、开口);把…密封(进容器)
    If you seal a container or an opening, you cover it with something in order to prevent air, liquid, or other material getting in or out. If you seal something in a container, you put it inside and then close the container tightly.

seal是什么意思

    e.g. She merely filled the containers, sealed them with a cork, and pasted on labels...
           她只是装满容器，用软木塞封住，然后贴上标签。
    e.g. A woman picks them up and seals them in plastic bags.
           一个女人把它们捡起来放入几只密封的塑料袋中。

3. 密封处
    The seal on a container or opening is the part where it has been sealed.

    e.g. When assembling the pie, wet the edges where the two crusts join, to form a seal.
           在包馅饼时，先把两片馅饼皮边沿接头部分弄湿，再将其捏合。

4. 密封装置;密封物
    A seal is a device or a piece of material, for example in a machine, which closes an opening tightly so that air, liquid, or other substances cannot get in or out.

    e.g. Check seals on fridges and freezers regularly.
           定期检查冰箱和冷冻柜的密封装置。

5. 封条;封蜡;封铅;火漆
    A seal is something such as a piece of sticky paper or wax that is fixed to a container or door and must be broken before the container or door can be opened.

    e.g. The seal on the box broke when it fell from its hiding-place...
           盒子从隐藏处掉落时，封口裂开了。
    e.g. Protestors banged on the sides of the lorry and broke customs seals on the doors.
           抗议者们猛砸卡车的侧面，并且撕掉了车门上的海关封条。

6. 印章;图章;玺;印记
    A seal is a special mark or design, for example on a document, representing someone or something. It may be used to show that something is genuine or officially approved.

    e.g. ...a supply of note paper bearing the Presidential seal...
           一批盖有总统印章的便条纸
    e.g. The best wines are entitled to a numbered seal of quality.
           上等葡萄酒可以盖上带编号的优质产品印章。

7. 封闭;封锁
    If someone in authority seals an area, they stop people entering or passing through it, for example by placing barriers in the way.

    e.g. The soldiers were deployed to help paramilitary police seal the border...
           部署士兵协助准军事警察封锁边境。
    e.g. A wide area round the two-storey building is sealed to all traffic except the emergency services.
           那个两层建筑周围的大片区域被封锁，只有提供应急服务的车辆可以通行。

8. 使成定局;确定
    To seal something means to make it definite or confirm how it is going to be.

    e.g. McLaren are close to sealing a deal with Renault...
           麦克拉伦即将与雷诺达成一笔交易。
    e.g. A General Election will be held which will seal his destiny one way or the other...
           一场决定他命运的大选即将举行。

9. 使确定下来;使成定局
    If something sets or puts the seal on something, it makes it definite or confirms how it is going to be.

    e.g. Such a visit may set the seal on a new relationship between the two governments...
           这样的一次访问可能会使两国政府间确立新关系。
    e.g. They see this election as a chance to put the final seal on the defeat of communism.
           他们把这次选举看作是彻底击败共产主义的一次机会。

10. 盖上印信的;不能拆开看的;保密的
    If a document is under seal, it is in a sealed envelope and cannot be looked at, for example because it is private.

    e.g. Because the transcript is still under seal, I am precluded by law from discussing the evidence.
           副本仍未公开，按照法律规定我不能讨论这项证据。

11. seal of approval -> see approval
      to seal someone's fate -> see fate
      my lips are sealed -> see lip
      signed and sealed -> see sign

相关词组：seal inseal offseal up

1. 海豹
    A seal is a large animal with a rounded body and flat legs called flippers. Seals eat fish and live in and near the sea, usually in cold parts of the world.

seal的近义词