To examine (a witness, for example) by questioning; interrogate.
To express doubt about; dispute.
To analyze; examine.
v.
intr. To ask questions.
[Middle English, from Old French, legal inquiry, from Latin quaestiō, quaestiōn-, from *quaestus, obsolete past participle of quaerere, to ask, seek.] ques'tion·er n., ques'tion·ing·ly adv.