question mark UK /ˈkwɛstʃ(ə)n ˌmɑːk/US /ˈkwɛstʃ(ə)n ˌmɑɹk/noun 4particle 1forms 1 noun4 •The punctuation mark "?", used at the end of a sentence to indicate a question.Do you see this curious-looking mark in the margin? It is a little crooked mark with a dot at the bottom of it. It is a question mark. It always comes at the end of questions. — 1856 •(figurative) A state of doubt or uncertainty.There’s a question mark over whether or not he’ll be fit for the next game. •(informal, figurative) An enigmatic, inscrutable, or mysterious person or thing; an enigma, a riddle.Let us admit that the Platonic dialogue is an enigma—something perplexing and to be wondered at. The Platonic dialogue is one big question mark. — 1964 •Polygonia interrogationis, a North American nymphalid butterfly with a silver mark on the underside of its hindwing resembling a question mark.Question Mark (Polygonia interrogationis). Preferred host plants are elms (Ulmus spp.), hackberry (Celtis spp.), hops (Humulus spp.), nettle (Urtica spp.), and false nettle (Boehmeria cylindrica). — 1990 particle1 •(informal) Final interrogative particle, expressing second-guessing, usually in an exaggerated, rising tone.So I see one movement towards a new kind of society, a new kind of mobility. So am I right, question mark? — 2014 formsquestion marks
