Meaning

noun a structure taller than its diameter; can stand alone or be attached to a larger building

noun anything that approximates the shape of a column or tower

noun a powerful small boat designed to pull or push larger ships

originFrom Middle English tour, tur, tor, from Old English tūr, tor, torr ("tower; rock"; > English tor) and Old French tour, toer, tor; both from Latin turris (“a tower”), Ancient Greek τύρρις (túrrhis) (Hesychius), τύρσις (túrsis). Displaced native Middle English stepel for the general sense of "tower". Compare Scots tour, towr, towre (“tower”), West Frisian toer (“tower”), Dutch toren (“tower”),…

Etymology from Wiktionary, CC BY-SA 3.0