Central Till Plains Get Printable Handwriting Hear It! Say It! Write It! Learn It! Spelling Test Definition noun. a flat area of land in the middle of the country covered with soil and rocks left by glaciers Example Sentence The central till plains are located in the Midwest. Synonyms middle plains; heartland; central prairies Antonyms mountains; hills Hear It! Say It! Write It! Central Till Plains Switch to cursive Start Share with your friends: