Dictionary

noun

Definitions

1. The punctuation mark "?", used at the end of a sentence to indicate a question.

   Synonyms:erotemeinterrogation markinterrogation pointinterrogativeinterrogative-point

2. A state of doubt or uncertainty.

   Example: There’s a question mark over whether or not he’ll be fit for the next game.

3. An enigmatic, inscrutable, or mysterious person or thing; an enigma, a riddle.

   Synonyms:mysterypuzzle

4. Polygonia interrogationis, a North American nymphalid butterfly with a silver mark on the underside of its hindwing resembling a question mark (sense 1).