la·​bo·​ri·​ous | \ lə-ˈbȯr-ē-əs How to pronounce laborious (audio) \

Definition of laborious

1 : devoted to labor : industrious as men of research … they are magnificently laborious and accurate— Aldous Huxley
2 : involving or characterized by hard or toilsome effort : labored The climb to the summit was slow and laborious.

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Other Words from laborious

laboriously adverb
laboriousness noun

Examples of laborious in a Sentence

a slow and laborious process the volunteers have been commendably laborious in their cleanup of the beach
Recent Examples on the Web But the number of new cases rose steadily, each requiring laborious contact tracing, and county public health officials quickly became overwhelmed. oregonlive, "How many more contact tracers does your county need before it can reopen? Oregon estimates provide clues.," 8 May 2020 Yet, the larger, heavier-duty Ram never feels laborious around town. Scott Oldham, Car and Driver, "2020 Ram 2500 Power Wagon Remains a Hulking Heavy-Duty Off-Roader," 30 Apr. 2020 Growing and maintaining a healthy, green lawn doesn’t have to be a time-consuming, laborious chore. Joseph Truini, Popular Mechanics, "The Most Popular Types of Lawn Grass," 19 Apr. 2020 But making them required the laborious printing of volumes of random numbers. Tim Folger, Discover Magazine, "Chance Encounters," 17 Aug. 2018 Opening a food truck in the city was a laborious process long before COVID-19. Justin Phillips,, "The future of San Francisco dining may rely on food trucks," 11 May 2020 Scrubbing up and gowning takes 15 minutes, a laborious process that includes putting on multiple layers of Tyvek suits, nitrile gloves and booties, along with an air-purifying respirator powered by a battery that belts around the waist. Robert Langreth,, "The Coronavirus Hunter Is Racing for Answers in a Locked-Down Lab," 8 May 2020 The idea was to automate part of a laborious process called contact tracing, which public health officials use to stem the spread of an infectious disease. Fred Vogelstein, Wired, "Health Officials Say 'No Thanks' to Contact-Tracing Tech," 8 May 2020 Contact tracing, or the act of tracking all those who have come into contact with an infected person, is normally a laborious process performed by health officials. Amanda Shendruk, Quartz, "How Bluetooth could unleash the world’s largest experiment in digital contact tracing," 16 Apr. 2020

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

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First Known Use of laborious

14th century, in the meaning defined at sense 1

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Time Traveler for laborious

Time Traveler

The first known use of laborious was in the 14th century

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Statistics for laborious

Last Updated

31 May 2020

Cite this Entry

“Laborious.” Dictionary, Merriam-Webster, Accessed 1 Jun. 2020.

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More Definitions for laborious


How to pronounce laborious (audio)

English Language Learners Definition of laborious

: requiring a lot of time and effort


la·​bo·​ri·​ous | \ lə-ˈbȯr-ē-əs How to pronounce laborious (audio) \

Kids Definition of laborious

: requiring much effort Rebuilding was a slow and laborious task.

Other Words from laborious

laboriously adverb

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