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question mark

Also called interrogation point, interrogation mark. a mark indicating a question: usually, as in English, the mark (?) placed after a question.
something unanswered or unknown:
His identity is still a question mark to most of us.
an anglewing butterfly, Polygonia interrogationis, having silver spots shaped like a question mark on the underside of each hind wing.
Origin of question mark
First recorded in 1865-70 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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Examples from the Web for question mark
Contemporary Examples
Historical Examples
  • Besides, the terms punctuation mark, period, and question mark should receive passing notice.

  • This is but the replacing of the question mark with a meaningless label.

    The Necessity of Atheism Dr. D.M. Brooks
  • In profile the most striking things about him were his nose and Adam's apple; he had a close resemblance to a question mark.

    The Lone Ranger Rides Fran Striker
  • Every interrogative sentence should end with a question mark.

    Plain English Marian Wharton
  • Weiss adds a question mark to several of his sections, but these have been included in the table.

British Dictionary definitions for question mark

question mark

the punctuation mark ?, used at the end of questions and in other contexts where doubt or ignorance is implied
this mark used for any other purpose, as to draw attention to a possible mistake, as in a chess commentary
an element of doubt or uncertainty
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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question mark in Culture

question mark definition

A punctuation mark (?) that follows a direct question: “Is Ralph really seven feet tall?”

The American Heritage® New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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