pyramids Get Printable Handwriting Hear It! Say It! Write It! Learn It! Spelling Test Definition noun. 1 a shape that has a square base and four triangular sides meeting at a point; 2 a massive structure built in ancient Egypt shaped like the above Example Sentence The pharaohs were entombed in the pyramids. Synonyms triangular shape; zikkurat; tomb Antonyms square; hexagon Hear It! Say It! Write It! pyramids Switch to cursive Start Share with your friends: