come alive
come alive or come to life {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.
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Source: A Dictionary of American Idioms
