1. the quality or state of being able to catch fire and burn easily

Examples

• The combustibility of gasoline makes it dangerous to store near open flames.
• Scientists test the combustibility of new materials before they are used in construction.
• The high combustibility of dry wood means it catches fire quickly.
• Fire safety regulations require manufacturers to reduce the combustibility of fabrics used in clothing.
• The combustibility of hydrogen gas is why it must be handled with extreme care in laboratories.