first born Get Printable Handwriting Hear It! Say It! Write It! Learn It! Spelling Test Definition adjective. the first child born to parents. Example Sentence Jaden is the first born of our three daughters. Spelled as two words. More Example Sentences Being the first born has its advantages. Synonyms eldest; first child; initial Antonyms youngest; last born; latecomer Hear It! Say It! Write It! first born Switch to cursive Start Share with your friends: