come alive v. 1. informal To become alert or attentive; wake up and look alive; become active.
When Mr. Simmons mentioned money, the boys came alive. Bob pushed the starter button, and the engine came alive with a roar. 2. To look real; take on a bright, natural look.
Under skillful lighting, the scene came alive. The President came alive in the picture as the artist worked. [TahlilGaran] English Idioms Dictionary ▲