what is growth industry?

The textbook does really explained it, but it is in the LOS, what exactly is a growth industry?

An industry that’s . . . well . . . growing. Usually rapidly.

healthcare

An industry which is currently in its growth phase (in its beginnings). This phase is characterized by high growth rates and low competition, negative cash flows due to big investments, no dividend distribution, etc.

I’m sure the books talk about this.