upsize Get Printable Handwriting Hear It! Say It! Write It! Learn It! Spelling Test Definition verb. to make something larger or bigger. Example Sentence I want to upsize my drink to a large. More Example Sentences The company decided to upsize their office. Synonyms enlarge; increase; expand Antonyms downsize; reduce; shrink Hear It! Say It! Write It! upsize Switch to cursive Start Share with your friends: