Cool off Definition 1 of 3Pro Tip 1/3Temperature Drop Used when temperatures decrease, especially after high heat conditions. Let's wait until the car cools off before we get in. Pro Tip 2/3Literal Cooling Often refers to objects or environments, not just people. Leave the cake out to cool off before icing it. Pro Tip 3/3Heat Relief Use it to suggest finding relief from hot weather or to prevent overheating. Drink this iced water to cool off a bit.