The term describes an object or container that is airtight, preventing the passage of air or other gases. An example is a glass jar with a rubber seal and a metal lid that is tightly clamped shut to preserve its contents.
This method of closure is crucial in various applications because it effectively shields the enclosed materials from oxidation, moisture, and contamination by microorganisms. Historically, it has been vital in food preservation, extending shelf life and reducing spoilage. In modern industries, this type of sealing is essential for protecting sensitive electronic components and pharmaceuticals from environmental damage, ensuring product integrity and functionality.
