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interrogation point

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noun
  1. question mark.
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Origin of interrogation point

First recorded in 1590–1600
Also called interrogation mark.

question mark

noun
  1. Also called interrogation point, interrogation mark. a mark indicating a question: usually, as in English, the mark (?) placed after a question.
  2. something unanswered or unknown: His identity is still a question mark to most of us.
  3. 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. 2018

British Dictionary definitions for interrogation mark

interrogation mark

noun
  1. a less common term for question mark
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question mark

noun
  1. the punctuation mark ?, used at the end of questions and in other contexts where doubt or ignorance is implied
  2. this mark used for any other purpose, as to draw attention to a possible mistake, as in a chess commentary
  3. an element of doubt or uncertainty
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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

interrogation mark in Culture

question mark

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

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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.