Définitions
1.NounThe punctuation mark "?", used at the end of a sentence to indicate a question.
2.NounA state of doubt or uncertainty."There’s a question mark over whether or not he’ll be fit for the next game."
3.NounAn enigmatic, inscrutable, or mysterious person or thing; an enigma, a riddle.
4.NounPolygonia interrogationis, a North American nymphalid butterfly with a silver mark on the underside of its hindwing resembling a question mark (sense 1).
5.ParticleFinal interrogative particle, expressing second-guessing, usually in an exaggerated, rising tone.