steep-sided Get Printable Handwriting Hear It! Say It! Write It! Learn It! Spelling Test Definition adjective. having very steep sides Example Sentence Athens had a steep-sided rocky acropolis. Spelled with a hyphen. Synonyms steep; sharply inclined; precipitous sloped Antonyms level; flat Hear It! Say It! Write It! steep-sided Switch to cursive Start Share with your friends: