- (informal or nonstandard) comparative form of : more curious
- 1865 November 26 (indicated as 1866), Lewis Carroll [pseudonym; Charles Lutwidge Dodgson], “The Pool of Tears”, in Alice’s Adventures in Wonderland, London: Macmillan and Co., OCLC 946274348, page 15:
- "Curiouser and curiouser!" cried Alice (she was so much surprised that for the moment she quite forgot how to speak good English). "Now I'm opening out like the largest telescope that ever was! Good-bye, feet!"