mo noun Stress: first syllable 🤍 Save Syllables: mo (1) English Definition An informal abbreviation for a moment. Example Sentence Wait a mo, I will be right back. US IPA /moʊ/ 🔊 Listen US UK IPA /məʊ/ 🔊 Listen UK Synonyms moment second instant jiffy Antonyms eternity lifetime Share this Word Facebook WhatsApp X Telegram Copy Link