ther·​mom·​e·​ter | \ thər-ˈmä-mə-tər How to pronounce thermometer (audio) , thə-ˈmä-mə-tər \
plural thermometers

Definition of thermometer

: an instrument for determining temperature specifically : one consisting of a sensor housed in a metal probe that registers a change in electrical resistance as a change in temperature

Keep scrolling for more

Other Words from thermometer

thermometric \ ˌthər-​mə-​ˈme-​trik How to pronounce thermometer (audio) \ adjective
thermometrically \ ˌthər-​mə-​ˈme-​tri-​k(ə-​)lē How to pronounce thermometer (audio) \ adverb

Examples of thermometer in a Sentence

Recent Examples on the Web Braun’s no-touch thermometer scored top marks in our testing, thanks to its accuracy, consistency and ease of use. Julianne Ross, CNN Underscored, "20 Amazon products our readers couldn’t get enough of in March," 2 Apr. 2021 Another Shopping reader favorite since last year, this iHealth digital thermometer has an infrared sensor and can take one’s temperature from about 3 centimeters away. Shari Uyehara, NBC News, "March reader favorites: Ellipticals, face masks, vacuums and more," 2 Apr. 2021 Broil the chicken for 8 minutes, or until the top is charred and a meat thermometer inserted into the thickest part of a leg registers 180 degrees., "Recipe: In this ‘dirty’ version of Syrian bulgur with chicken, a cookbook author turns the traditional dish on its head," 30 Mar. 2021 The company explained that import problems and inflated taxes levied on Chinese imports were to blame for the sky-high price, but that didn’t stop more than a million people from buying this sleek no-touch thermometer. Maren Estrada, BGR, "The ‘iPhone of forehead thermometers’ cost $60 in 2020 – now Amazon has it for $20," 25 Mar. 2021 This 20-piece kit includes easy-to-clean stainless-steel tools, including tongs, a spatula, corn holders and a fork that doubles as a meat thermometer. Lizzy Briskin,, "What you need to host a BBQ," 24 Mar. 2021 Basic first-aid supplies and medications include: A thermometer. Mayo Clinic, oregonlive, "Daylight saving time starts: here’s what else you should change today," 14 Mar. 2021 Read on and discover why thousands of Amazon shoppers swear this product is just as essential as their heavy duty stand mixer and meat thermometer. Patricia S York, Southern Living, "These Food Savers Will Help Keep Your Produce Fresher For Longer," 21 Feb. 2021 So, invest in a great meat thermometer and stop stressing about undercooked poultry for good. Samantha Macavoy, Good Housekeeping, "How Long To Cook a Turkey per Pound," 12 Oct. 2020

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'thermometer.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

See More

First Known Use of thermometer

1633, in the meaning defined above

History and Etymology for thermometer

French thermomètre, from Greek thermē heat + French -o- + -mètre -meter — more at therm

Keep scrolling for more

Learn More about thermometer

Time Traveler for thermometer

Time Traveler

The first known use of thermometer was in 1633

See more words from the same year

Statistics for thermometer

Last Updated

12 Apr 2021

Cite this Entry

“Thermometer.” Dictionary, Merriam-Webster, Accessed 14 Apr. 2021.

Style: MLA
MLACheck Mark Icon ChicagoCheck Mark Icon APACheck Mark Icon Merriam-WebsterCheck Mark Icon

Keep scrolling for more

More Definitions for thermometer



English Language Learners Definition of thermometer

: an instrument used for measuring temperature


ther·​mom·​e·​ter | \ thər-ˈmä-mə-tər How to pronounce thermometer (audio) , thə-ˈmä- \

Kids Definition of thermometer

: an instrument for measuring temperature


ther·​mom·​e·​ter | \ thə(r)-ˈmäm-ət-ər How to pronounce thermometer (audio) \

Medical Definition of thermometer

: an instrument for determining temperature that usually consists either of a device providing a digital readout or of a glass bulb attached to a fine tube of glass with a numbered scale and containing a liquid (as mercury or colored alcohol) that is sealed in and rises and falls with changes of temperature

Keep scrolling for more

More from Merriam-Webster on thermometer

Nglish: Translation of thermometer for Spanish Speakers

Britannica English: Translation of thermometer for Arabic Speakers Encyclopedia article about thermometer

Comments on thermometer

What made you want to look up thermometer? Please tell us where you read or heard it (including the quote, if possible).


Test Your Vocabulary

The Exceptions Quiz III

  • one green toy robot amidst many red toy robots
  • Which of these words does not mean "nonsense"?
Spell It

Can you spell these 10 commonly misspelled words?

 AlphaBear 2

Spell words. Make bears.

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!