1. plural of gas; substances that are neither liquid nor solid at room temperature

1. third person singular present of gas; fills with gas or treats with gas

Examples

• The scientist studied how different gases behave under pressure.
• Oxygen and nitrogen are the main gases in our atmosphere.
• The car gases up at the station every week.
• Toxic gases escaped from the chemical plant.
• Noble gases like helium don’t react easily with other elements.
• The mechanic gases the engine before starting the test.
• Greenhouse gases trap heat in Earth’s atmosphere.