[ luh-bawr-ee-uhs, -bohr- ]
/ ləˈbɔr i əs, -ˈboʊr- /


requiring much work, exertion, or perseverance: a laborious undertaking.
characterized by or requiring extreme care and much attention to detail: laborious research.
characterized by or exhibiting excessive effort, dullness, and lack of spontaneity; labored: a strained, laborious plot.
given to or diligent in work: a careful, laborious craftsman.

Nearby words

  1. laboratory diagnosis,
  2. laboratory school,
  3. labored,
  4. laboredly,
  5. laborer,
  6. laboriously,
  7. laborism,
  8. laborite,
  9. labors of hercules,
  10. laborsaving

Origin of laborious

First recorded in 1350–1400; Middle English word from Latin word labōriōsus. See labor, -ious

Related forms Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for laboriously

British Dictionary definitions for laboriously


/ (ləˈbɔːrɪəs) /


involving great exertion or long effort
given to working hard
(of literary style, etc) not fluent
Derived Formslaboriously, adverblaboriousness, noun

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for laboriously
Online Etymology Dictionary, © 2010 Douglas Harper