Definition Of airtight
not allowing air to escape or pass through.
Most modern stoves are airtight and allow the amount of combustion air that feeds the flame to be controlled.
Example Of airtight
A baby is placed inside a clear acrylic box, resembling an incubator, which creates an airtight seal around its chest.
A small airtight box divided into sections with strips of cardboard is ideal.
A small amount of sugar is added to the bottle before sealing it airtight .
Allow to cool slightly before storing in an airtight container or zip lock bag.
And the case we had against them was airtight .