Definitions of torch:

noun: a light carried in the hand; consists of some flammable substance
noun: a burner that mixes air and gas to produce a very hot flame
noun: a small portable battery-powered electric lamp
noun: tall-stalked very woolly mullein with densely packed yellow flowers; ancient Greeks and Romans dipped the stalks in tallow for funeral torches
verb: burn maliciously, as by arson
Example: "The madman torched the barns"