Final answer:
A simile is a comparison between two things using "like" or "as".
Step-by-step explanation:
The correct definition of the literary device simile is: a comparison between two things using "like" or "as". Similes are used to make a comparison between two things by highlighting their similarities in a clear and explicit manner. For example, "She runs like a cheetah" is a simile because it compares the act of running to the speed and agility of a cheetah.
Learn more about Simile