sec noun adjective Stress: first syllable 🤍 Save Syllables: sec (1) English Definition Informal abbreviation for a second (unit of time). Example Sentence Wait a sec, I'm coming. US IPA /sek/ 🔊 Listen US UK IPA /sek/ 🔊 Listen UK Synonyms second moment instant jiffy Antonyms eternity age Share this Word Facebook WhatsApp X Telegram Copy Link