Star Trek: The Next Generation1987

Doctor Beverly Crusher:
[on the definition of life] The broadest scientific definition might be that life is what enables plants and animals to consume food, derive energy from it, grow, adapt themselves to their surroundings, and reproduce.

Lt. Commander Data:
Hm... And you suggest that anything that exhibits these characteristics is considered alive?

Doctor Beverly Crusher:
In general, yes.

Lt. Commander Data:
What about fire?

Doctor Beverly Crusher:
Fire?

Lt. Commander Data:
Yes. It consumes fuel to produce energy, it grows, it creates offspring. By your definition, is it alive?

Doctor Beverly Crusher:
Fire is a chemical reaction. You could use the same argument for growing crystals, but obviously we don't consider them alive.

Lt. Commander Data:
And what about me? I do not grow; I do not reproduce. Yet I am considered to be alive.

Doctor Beverly Crusher:
That's true. But you are unique.

Lt. Commander Data:
Hm... I wonder if that is so.