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 Simply determining the category and code for an item can be a laborious process — and the means for rejecting a waiver are, at best, opaque. NBC News, "Amid opaque tariff process, questions arise as to why some companies receive exemptions," 13 Feb. 2020 Emulators, based on a form of AI called machine learning, skip the laborious reproduction of nature. Matthew Hutson, Science | AAAS, "From models of galaxies to atoms, simple AI shortcuts speed up simulations by billions of times," 12 Feb. 2020 Murray is a notoriously laborious worker in the gym, and a film-room rat. Jeff Mcdonald,, "Time and experience key to Dejounte Murray’s growth," 7 Feb. 2020 With a pretty laborious unboxing due to all the heavy-duty packaging, Loecke finally revealed a serpentine cabinet. Kelly Corbett, House Beautiful, "Madcap Cottage Founders Unbox Dollhouse and Serpentine Cabinet from Duke and Duchess of Gloucester," 6 Feb. 2020 The 2020 recruiting cycle will close on Wednesday with the second national signing day, ending the laborious, often frantic alignment of future student-athletes with Bowl Subdivision programs. Paul Myerberg, USA TODAY, "Behind scenes, college football coaches share knowledge with rivals to help recruits find homes," 5 Feb. 2020 The espionage also contributes to baseball’s laborious pace as teams try to avoid their signs from being swiped. Globe Staff,, "Punishment for Astros shows MLB’s sign-stealing days are over — and the Red Sox are next," 13 Jan. 2020 The light's reflected in her eyes—likely the result of some laborious manipulation on Snowdon's part. Chloe Foussianes, Town & Country, "Lord Snowdon’s Work Was About So Much More Than the Royal Family," 15 Dec. 2019 Williams went through a laborious rehab regimen to get back on the practice field. Tyler Dragon,, "Cincinnati Bengals rookie LT Jonah Williams is 'excited' by opportunity to practice again," 12 Dec. 2019

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

22 Mar 2020

Cite this Entry

“Laborious.” Dictionary, Merriam-Webster, Accessed 29 Mar. 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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