acronyms Get Printable Handwriting Hear It! Say It! Write It! Learn It! Spelling Test Definition noun. a word formed by putting together the first letters or parts of a series of words in a longer phrase Example Sentence The teacher gave us a list of acronyms. Synonyms letters of a word; initials; radar Antonyms full word Hear It! Say It! Write It! acronyms Switch to cursive Start Share with your friends: