Definition of "question mark" []

• A punctuation symbol (?) written at the end of a sentence or phrase to indicate a direct question. Also called interrogation point. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "Ellipses after a question mark are always strategically placed."
• "With the battalion and battery chiefs, the great question mark of the campaign was not whether Pendleton went or remained, but whether the horses could survive hard work, poor shoeing, and half-feed."
• "But his immoderate taste for the high life which he shared with General Howe curled a question mark over his capacities, and even in a farewell and affectionate letter to his wife before he sailed for Boston in 1775, he felt obliged, as a self-confessed libertine, to couple his declarations of everlasting love with apologies for “the levities, the inattentions, and dissipations of my common course of life.”"