1. a person who talks too much, especially in a boring or boastful way
Usage: informal
2. a bag or container that holds gas, especially in a balloon or airship
Usage: technical

Examples

• Don’t invite him to the meeting; he’s such a gasbag that nothing will get done.
• The old gasbag kept talking for hours about his glory days.
• She rolled her eyes as the gasbag at the party dominated every conversation.
• The airship’s gasbag was filled with helium for safety.
• Engineers inspected the gasbag for any signs of leakage.
• The hot air balloon’s gasbag expanded as it heated up.