heater

noun

heat·​er ˈhē-tər 

1

: one that heats

especially : a device that imparts heat or holds something to be heated

2

: fastball

Examples of heater in a Sentence

Recent Examples on the Web

For Park, the routine includes daily eye and ear wipes, occasional baths based on Gren's needs and a small heater to keep her comfortable when the air conditioning is on. — Pat Mueller, USA Today, 22 Aug. 2026

Testing heat without sunlight Zeno’s payload centers on a five-watt radioisotope heater unit containing americium-241. — Aamir Khollam, Interesting Engineering, 20 Aug. 2026

Hunker Pod options include a more flexible Lagun table, Boxio dry toilet and auxiliary heater. — New Atlas, 20 Aug. 2026

This year, though, with the Jays exiting a buy-and-sell deadline in danger of squandering their season, Kirk’s latest heater might be season-saving. — Mitch Bannon, New York Times, 19 Aug. 2026

Word History

First Known Use

15th century, in the meaning defined at sense 1

Phrases Containing heater

• immersion heater
• quartz heater
• space heater
• water heater

Rhymes for heater

• beater
• cheater
• dieter
• eater
• liter
• litre
• meter
• metre
• neater
• praetor
• seater
• skeeter

Kids Definition

heater

noun

heat·​er ˈhēt-ər 

: a device that heats or holds something to be heated