noun:a device that automatically adjusts the temperature in a room temperature to a desired level
noun:an automatic device for regulating temperature (as by controlling the supply of gas or electricity to a heating apparatus)
Examples
I set the 'thermostat' to 68 degrees.
Movie quotes
(..) - Needs a new carburetor to start. - Oh, yeah? Kind of put fixing her up on hold for a while. Yeah. Ahem. Hey, Brad, hand me a thermostat, would you? What's this, uh, do? When there's an instant drop in temperature... ...the thermostat (..)