Air-tight

Describing something that is completely sealed to prevent air, gas, or other substances from entering or escaping. It implies an impenetrable barrier, preventing any leakage or exchange with the external environment. This quality is crucial for preserving contents, maintaining controlled conditions, or ensuring safety by containing hazardous materials. The term can also be used figuratively to describe a situation or argument that is logically sound and defensible, with no weaknesses.

Air-tight meaning with examples

• The astronaut's helmet featured an air-tight seal, ensuring their survival in the vacuum of space. Without it, they couldn't breathe. This was a key point in the mission's success, it needed to be air-tight, otherwise the mission would've failed.
• To preserve the freshness of the coffee beans, store them in an air-tight container. This will prevent oxygen from degrading the flavor, protecting the quality of the grind and the overall taste of each cup.
• The government's air-tight security measures kept classified information secret. The nation's secrets were protected from prying eyes through the use of air-tight, almost unbreakable, policies and physical protection.
• The defense lawyer presented an air-tight case, supported by irrefutable evidence. His arguments were logical, making it impossible for the prosecution to find any loopholes within the case, eventually leading to the ruling of innocence.