Meaning

noun the chair of state for a monarch, bishop, etc.

noun a plumbing fixture for defecation and urination

noun the position and power of an exalted person (a sovereign or bishop) who is entitled to sit in a chair of state on ceremonial occasions

originFrom Middle English trone, from Old French trone, from Latin thronus, from Ancient Greek θρόνος (thrónos, “chair, throne”). Superseded earlier seld (“seat, throne”).

Etymology from Wiktionary, CC BY-SA 3.0