Definitions

1. noun

an electrical device that produces heat, especially one used for warming a room or building

“She turned up the heater to warm the living room.”

2. noun

a device or machine that heats something, such as a gas or liquid

“The heater on the oil refinery malfunctioned, causing a fire.”

3. verb

to heat or warm something, especially using a heater

“The engineer had to heater the mixture before processing it.”

4. verb

to make something warmer or more comfortable

“The heater in the car helped to warm up the driver on a cold winter morning.”

5. verb

to make or become more enthusiastic or excited

“The news of the concert heater up the crowd, and they started cheering.”