Meaning

noun a single great stone (often in the form of a column or obelisk)

originThe noun is borrowed from French monolithe (“object made from a single block of stone”), from Middle French monolythe (“made from a single block of stone”) (rare), and from their etymon Latin monolithus (“made from a single block of stone”), from Ancient Greek μονόλιθος (monólithos, “made from a single block of stone”), from μονο- (mono-, prefix meaning ‘alone; single’) (from μόνος (mónos,…

Etymology from Wiktionary, CC BY-SA 3.0