live wire Get Printable Handwriting Hear It! Say It! Write It! Learn It! Spelling Test Definition noun. a person who is very energetic and lively. Example Sentence The brown wire in the plug is a live wire. OR Kathy is a live wire. More Example Sentences The child is a live wire during games. Synonyms energetic; lively; spirited Antonyms lazy; dull; inactive Hear It! Say It! Write It! live wire Switch to cursive Start Share with your friends: