A figure of speech that makes a comparison between two unlike things and uses the words "like," "as," "than" or "resembles."

Example From Text

Shall I compare thee to a summer's day? Thou art more lovely and more temperate.


Here, Shakespeare writes that his beloved is lovelier and more constant than a summer day. The word "than" is implied, even though it does not appear in the poem, so this is a simile.