grapefruits Get Printable Handwriting Hear It! Say It! Write It! Learn It! Spelling Test Definition plural noun. round yellowish fruits with a tangy taste. Example Sentence They ate grapefruits for breakfast. More Example Sentences Some people enjoy grapefruit juice daily. Synonyms citrus; pomelo; fruit Antonyms sweet fruit; apple; banana Hear It! Say It! Write It! grapefruits Switch to cursive Start Share with your friends: