Final answer:
A simile is a figure of speech that compares two different things using the words 'like' or 'as'. 'Smart as a fox' means someone who is clever and quick-witted, while 'run like the wind' means to run very fast.
Step-by-step explanation:
Smart as a fox: This simile means someone who is clever and quick-witted, similar to how foxes are known for their cunning nature.
Run like the wind: This simile means to run very fast, as the wind moves swiftly.
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