Definitions
1.NounThe duration during which a radio or television program (or part of one) is transmitted."Can you get me some airtime for my latest single?"
2.NounThe duration spent talking during a conversation.
3.NounThe chargeable use of a mobile phone, either in minutes or in units dependent on the use or traffic.
4.NounThe period of freefall after jumping.
5.NounThe period during which a person riding a rollercoaster or similar ride experiences a feeling of weightlessness.