question [ˈkwɛstʃən]

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¹ question noun

• a sentence, phrase, or word that asks for information or is used to test someone's knowledge
• a matter or problem that is being discussed : a subject or topic —often + of
• doubt or uncertainty about something —often used in negative statements

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² question verb

• to ask (someone) questions about something —often + about
• to have or express doubt about (something)