airtight
/ˈɛrˌtaɪt/
adjective
- Sealed so that no air can get in or out.
- The container is airtight, so the cookies will stay fresh for weeks.
- We need an airtight seal on the window to stop the draft.
- The submarine's hatch must be airtight to keep water out.
- Having no weaknesses or flaws; impossible to disprove or argue against.
- The detective built an airtight case against the suspect.
- Her argument was airtight, leaving no room for doubt.
- They signed an airtight contract that protected both parties.