burn time

burn time (countable and uncountable, plural burn times)

1. (physics, astronautics) The amount of time in which which the propellant charge of a rocket engine is completely consumed.
2. The total amount of time a single load of wood will burn from the moment of ignition until the moment of smoldering.

burn time (third-person singular simple present burns time, present participle burning time, simple past and past participle burned time)

1. (idiomatic) To waste time unnecessarily.