Definition of the gas
- He was driving with one foot on the gas and one foot on the brake.
: a fluid (such as air) that has neither independent shape nor volume but tends to expand indefinitely
: a combustible gas or gaseous mixture for fuel or lighting
: a gaseous product of digestion
: to talk idly or garrulously
: to give off gas (see 1gas 1)
: to fill the tank (as of an automobile) with gasoline
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