Entry 2 senses Webster, 1913 Firebrand /fī'-ẽrb-răndˌ/ · Fire·brand · IPA /ˈfaɪɚ.bɹænd/ 01 n. A piece of burning wood. 1. A piece of burning wood. 2. One who inflames factions, or causes contention and mischief; an incendiary.