buttresses Get Printable Handwriting Hear It! Say It! Write It! Learn It! Spelling Test Definition plural noun. structures built to support a wall or building. Example Sentence The wall would have collapsed without the stone buttresses. More Example Sentences Old buildings often have strong buttresses. Synonyms supports; props; braces Antonyms let down; weaken Hear It! Say It! Write It! buttresses Switch to cursive Start Share with your friends: