twenty-seven Get Printable Handwriting Hear It! Say It! Write It! Learn It! Spelling Test Definition noun. oradjective. the cardinal number that is the sum of twentysix and one Example Sentence That tree has twenty-seven flowers on it. Synonyms 27; XXVII; one more than 26 Antonyms zero Hear It! Say It! Write It! twenty-seven Switch to cursive Start Share with your friends: