: 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
Our mattress tester was pleased that the packaging was manageable to move up the stairs with the help of her roommate. Yelena Moroz Alpert, Architectural Digest, 14 July 2026 Our staff and testers A beauty product is a personal purchase. Catharine Malzahn, Allure, 13 July 2026 Powar explained that organisations have traditionally relied on specialist penetration testers to examine systems from an attacker’s perspective. Christopher McFadden, Interesting Engineering, 10 July 2026 Every week your team spends building the tester, your competitors spend improving the product. Mudit Singh, Forbes.com, 8 July 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

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Cite this Entry

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