If a container has a hermetic seal, the seal is very tight so that no air can get in or out.
例句
This would permit air to enter, breaking the hermetic seal of the jar.這會造成漏氣，破壞罐子的密封性。
ADJ-GRADED
與外界隔絕的;不受外界干擾的
You use hermetic to describe something which you disapprove of because it seems to be totally separate from other people and things in society.
例句
Its film industry operates in its own curiously hermetic way...其電影產業以它奇特的與世隔絕的方式運作。Their work is more cosily hermetic than ever.他們的工作比任何時候都要更加安逸，更加不受外界干擾。
英漢詞典釋義
adj.
密封的
a hermetic closure密封蓋The hermetic seal on the packet means that the food lasts longer.封袋上的密封印表明食物能保存更長的時間。