Time flew by like a bird.

Meaning: She was so focused on the book that she didn't notice how much time was passing.

Choice of Words: Time is the period during which an action, process, or event takes place. Fly is to move through the air using wings. Bird is a warm-blooded vertebrate animal that has feathers and lays eggs. The sentence suggests that the person was so engrossed in the book that they lost track of time.

Alternative Expressions

Related Expressions