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Question mark

//ˈkwɛstʃ(ə)n ˌmɑːk// noun, particle, slang

Noun

1
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."
2
a punctuation mark (‘?’) placed at the end of a sentence to indicate a question wordnet
3
A state of doubt or uncertainty. figuratively, informal
"There’s a question mark over whether or not he’ll be fit for the next game."
4
An enigmatic, inscrutable, or mysterious person or thing; an enigma, a riddle. figuratively, informal
"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."
5
Polygonia interrogationis, a North American nymphalid butterfly with a silver mark on the underside of its hindwing resembling a question mark (sense 1).
"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)."

Particle

1
Final interrogative particle, expressing second-guessing, usually in an exaggerated, rising tone. colloquial
"All real discovery comes from the ?, the basic curiosity and acceptance of, “Well, we think subatomic particles might exist, at least they have a tendency to exist, but we really don’t know for sure, you know, question mark?”"

Unscramble this word: questionmark