Definition

Not allowing gas to pass through; completely sealed against gas.

Example

The container is designed to be gastight to prevent any gas leaks.

Conversation

I heard the new containers are gastight and perfect for storing food.

That sounds great! I hate when my food goes stale.

Yeah, being gastight will definitely help with freshness.

I should get some for my kitchen then!

Synonyms & Antonyms

Root Explanation

Gastight → It is formed from "gas" (from Greek "khaos", meaning a state of matter that fills space) and "tight" (from Old English "tīht", meaning firmly held or secure). The word "gastight" means securely sealed against the passage of gas.

Memory Tip

Think of something that is securely sealed so that no gas can escape — 'tight' means firmly held, and 'gas' refers to the state of matter.

Visually Confused Words