Grade 7 rectangle Get Printable Handwriting (rec-tan-gle) 3 syllables Rhymes Learn It! Spelling Test Definition noun. a foursided polygon that has four right angles and each pair of opposite sides parallel and of the same length Example Sentence The rectangle has four sides. Synonyms shape; box; figure Antonyms circle Rhymes Three Syllable Rhymes (1) rectangle Share with your friends: