airtight
/ˈɛːtʌɪt
/adjective
1Not allowing air to escape or pass through: an airtight box...
- Most modern stoves are airtight and allow the amount of combustion air that feeds the flame to be controlled.
- A small airtight box divided into sections with strips of cardboard is ideal.
- The foil is there largely for aesthetic reasons since the cork should provide an airtight seal and only a faulty one will allow any seepage of wine.
Synonyms
sealed, closed, shut tight, tight, impermeable, hermetically sealed;
watertight, waterproof
1.1Having no weaknesses; unassailable: she had an airtight alibi...
- He had pulled off a big score recently, and with an airtight alibi he'd actually paid a couple of women to accompany him to Ibiza for a wild week while the heat died down.
- Illingworth siblings do not exude that air; certainly Duke has motives for crime, though his alibi seems airtight.
- You cannot have airtight, foolproof countermeasures that would prevent incidents of kidnapping like this.
Synonyms
indisputable, unquestionable, incontrovertible, undeniable, incontestable, irrefutable, unassailable, beyond dispute, beyond question, beyond doubt;
foolproof, sound, flawless, watertight, conclusive, without loopholes