: one that tests or is used for testing
: the canopy over a bed, pulpit, or altar

Examples of tester in a Sentence

Recent Examples on the Web
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Noun
Bake in the heated oven for 50 to 60 minutes or until a tester inserted in the center comes out clean. — Candy Hom, AJC.com, 17 Oct. 2026 Our tester featured available comforts such as premium audio, a surround-view camera system, and optional carbon bucket seats. — Bradley Iger, Robb Report, 16 Oct. 2026 But the phone’s first public testers have given glowing feedback. — Andrew R. Chow, Time, 15 Oct. 2026 Most importantly, testers should see that their feedback genuinely shapes the final product. — Expert Panel®, Forbes.com, 13 Oct. 2026 See All Example Sentences for tester

Word History

Etymology

Noun (2)

Middle English, headboard of a bed, canopy, from Anglo-French, from teste head, from Late Latin testa skull, from Latin, shell

Noun (3)

modification of Middle French testart, from teston

First Known Use

Noun (1)

1661, in the meaning defined above

Noun (2)

14th century, in the meaning defined above

Noun (3)

1546, in the meaning defined above

Time Traveler
The first known use of tester was in the 14th century

Browse Nearby Words

Cite this Entry

“Tester.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/tester. Accessed 20 Oct. 2026.

Kids Definition

: a canopy or a frame for a canopy over a bed, pulpit, or altar

tester

2 of 2 noun
test·​er
ˈtes-tər
: one that tests

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