A simile is a comparison between two things.
It is signaled overtly; in English, a simile is expressed by the words like or as.
He had a posture like a question mark.
Mish, Frederick (editor). 1991.Webster's ninth new collegiate dictionary. Springfield, MA: Merriam-Webster. 1,564 pages. 0877795088; indexed 0877795096; deluxe 087779510X.
Corbett, Edward P. J. 1971.Classical rhetoric for the modern student. New York: Oxford University.
Beekman, John, and John Callow. 1974.Translating the Word of God. Grand Rapids, MI: Zondervan.