<p><strong>Noun:</strong></p><ul><li>A device, including a relay actuated by thermal conduction or convection, that functions to establish and maintain a desired temperature automatically or signals a change in temperature for manual adjustment.</li></ul><p><strong>Verb:</strong></p><ul><li>(Used with object) Thermostatted or thermostated; thermostatting or thermostatting.</li><li>To equip or control with a thermostat.</li></ul>