jabber Get Printable Handwriting (jab-ber) 2 syllables Learn It! Spelling Test Definition noun. unintelligible or meaningless talkverb. to engage in casual or rambling conversation Example Sentence We listened to the jabber of the baby. OR Do not jabber during the test. Synonyms gibberish; blather; nonsense; chatter Antonyms clear speech; intelligent speech Share with your friends: