“Q.E.D. (quod erat demonstrandum): Which was to be demonstrated: used to indicate that something has just been showed or proved. ‘By making this call—which reduces both characters to still more tears—Vito miraculously learns to “stop hating himself.” He then decides, Q.E.D., that the time has come to quit his ad-agency job and settle down with Theda to collaborate on hit plays.’ Frank Rich, The New York Times”
Excerpted from: Grambs, David. The Random House Dictionary for Writers and Readers. New York: Random House, 1990.
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