A stove is a machine that heats or cooks. If you want really delicious popcorn, don't use the microwave — cook it the old-fashioned way, in a pot of hot oil on the stove.
Stoves typically use gas or electricity. If you have a wood-burning stove in your house, you know it's an apparatus that burns split logs to create enough heat to warm up a room — or several rooms. In the 15th century, stove meant either "heated room" or "bathroom." Experts aren't sure about the word's origin, although some guess a connection to Vulgar Latin's extufare, "take a steam bath."