laboratory

noun

lab·​o·​ra·​to·​ry ˈla-b(ə-)rə-ˌtȯr-ē How to pronounce laboratory (audio)
sometimes ˈla-bər-ˌtȯr-
or ˈla-bə-ˌtȯr-
or lə-ˈbȯr-ə-ˌtȯr-
plural laboratories
often attributive
1
a
: a place equipped for experimental study in a science or for testing and analysis
a research laboratory
broadly : a place providing opportunity for experimentation, observation, or practice in a field of study
b
: a place like a laboratory for testing, experimentation, or practice
That area is a laboratory for cultivating the germ of terrorism.
2
: an academic period set aside for laboratory work
a course of study requiring two lectures and one laboratory per week

Examples of laboratory in a Sentence

experiments conducted in a modern laboratory
Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
The arrest, the official explained, came after the Attorney General’s Office concluded that there had been misconduct in an April operation in which state officials dismantled a clandestine drug-manufacturing laboratory. — Mauricio Torres, CNN Money, 18 Oct. 2026 Uncertainty over federal funding has already placed pressure on institutions that depend on government grants to support researchers, laboratories, and long-term projects. — Bojan Stojkovski, Interesting Engineering, 17 Oct. 2026 Yuzhou Zhang, a biologist at Northwest A&F University in China, was studying how plants move in response to gravity in a laboratory in Austria when one of his agar plates became contaminated with airborne microbes. — Joanna Thompson, Scientific American, 17 Oct. 2026 The next step is to test Plant Armor beyond the laboratory – on commercial farms, in different locations and with different crops. — Maryna Holovnova, New Atlas, 17 Oct. 2026 See All Example Sentences for laboratory

Word History

Etymology

Medieval Latin laboratorium, from Latin laborare to labor, from labor

First Known Use

1592, in the meaning defined at sense 1a

Time Traveler
The first known use of laboratory was in 1592

Browse Nearby Words

Cite this Entry

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

Kids Definition

plural laboratories
: a place equipped for making scientific experiments and tests

Medical Definition

laboratory

noun
lab·​o·​ra·​to·​ry
ˈlab-(ə-)rə-ˌtōr-ē, -ˌtȯr-, British usually lə-ˈbär-ə-t(ə-)rē
plural laboratories
often attributive
: a place equipped for experimental study in a science or for testing and analysis

More from Merriam-Webster on laboratory

Love words? Need even more definitions?

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