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question mark

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noun
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.
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Origin of question mark

First recorded in 1865–70
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021

How to use question mark in a sentence

British Dictionary definitions for question mark

question mark

noun
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

Cultural definitions for question mark

question mark

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

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