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English definition of “inflate”

inflate

verb [I/T] (FILL WITH AIR)   /ɪnˈfleɪt/
to cause an object to increase in size and shape by filling it with air or gas, or (of an object) to become larger as a result of this process: [T] to inflate balloons [I] Air bags in cars are designed to inflate automatically on impact.
(Definition of inflate verb (FILL WITH AIR) from the Cambridge Academic Content Dictionary © Cambridge University Press)
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