Meaning

noun the state of being under the control of another person

noun someone held in bondage

originFrom Middle English thral, thralle, threl, threlle, from Old English þrǣl (“thrall, slave, servant”), from Old Norse þræll (“slave”), from Proto-Germanic *þrahilaz, *þragilaz, *þrigilaz (“runner, gofer, servant”), from Proto-Indo-European *tregʰ- (“to pull, drag, race, run”), possibly a variant of *dʰregʰ- (“to run”); related to Gothic 𐌸𐍂𐌰𐌲𐌾𐌰𐌽 (þragjan), Old English þrǣġan (“to run”).

Etymology from Wiktionary, CC BY-SA 3.0