• WordNet 3.6
    • adj laborious characterized by effort to the point of exhaustion; especially physical effort "worked their arduous way up the mining valley","a grueling campaign","hard labor","heavy work","heavy going","spent many laborious hours on the project","set a punishing pace"
    • ***
Webster's Revised Unabridged Dictionary
    • Laborious Devoted to labor; diligent; industrious; as, a laborious mechanic.
    • Laborious Requiring labor, perseverance, or sacrifices; toilsome; tiresome. "Dost thou love watchings, abstinence, or toil, Laborious virtues all? Learn these from Cato."
    • ***
Century Dictionary and Cyclopedia
    • laborious Requiring much labor, exertion, or perseverance; toilsome; not easy: as, laborious duties; a laborious undertaking.
    • laborious Using exertion; practising labor; diligent in work or service; assiduous: as, a laborious husbandman or mechanic; a laborious minister or pastor.
    • laborious Characterized by labor or effort; marked by or manifesting labor.
    • laborious Synonyms Difficult arduous, wearisome, fatiguing, onerous.
    • laborious Industrious, painstaking, active, hard-working.
    • ***
Chambers's Twentieth Century Dictionary
    • adj Laborious full of labour: toilsome: wearisome: devoted to labour: industrious
    • ***


Webster's Revised Unabridged Dictionary
L. laboriosus, fr. labor, labor: cf. F. laborieux,
Chambers's Twentieth Century Dictionary
O. Fr. labour, labeur—L. labor.


In literature:

Desultory in some of his literary occupations, he was laborious in pruning and perfecting his poetical compositions.
"The Modern Scottish Minstrel, Volumes I-VI." by Various
The bamboo pole, for instance, had been most laboriously burned off, close to its base.
"As It Was in the Beginning" by Philip Verrill Mighels
The descent was as anxious and hazardous as the ascent had been laborious.
"Ten Thousand Miles with a Dog Sled" by Hudson Stuck
We had given the treasures, which were laboriously chosen with a view to suitability.
"The Lady of the Basement Flat" by Mrs. George de Horne Vaizey
Travelling under such circumstances is not only difficult and laborious, but is extremely perilous.
"The Young Voyageurs" by Mayne Reid
Slowly and laboriously the "prairie schooner" lumbered along the uneven route.
"Roosevelt in the Bad Lands" by Hermann Hagedorn
Then, for twelve years, he was employed in teaching and in many laborious and self-denying duties.
"The Adventures of the Chevalier De La Salle and His Companions, in Their Explorations of the Prairies, Forests, Lakes, and Rivers, of the New World, and Their Interviews with the Savage Tribes, Two Hundred Years Ago" by John S. C. Abbott
Presently I saw him climbing laboriously up the stairs to the second floor where the chief had his office.
"The Escape of Mr. Trimm" by Irvin S. Cobb
Laboriously I got all the blacks together and in one box.
"Working With the Working Woman" by Cornelia Stratton Parker
A newer piece of hawser was produced, and the skiff despatched once more on its laborious errand.
"Two on the Trail" by Hulbert Footner

In poetry:

O that I were
Again on English hills,
Seeing between
Laborious villages
Her cool dark loveliness.
"English Hills" by John Freeman
Now by what whim of wanton chance
Do radiant eyes know sombre days?
And feet that shod in light should dance
Walk weary and laborious ways?
"As Winds That Blow Against A Star" by Alfred Joyce Kilmer
And more; methought I saw that flood,
Which now so dull and darkling steals,
Thick, here and there, with human blood,
To turn the world's laborious wheels.
"Beaver Brook" by James Russell Lowell
And let not footsteps come
Too frequent round that nook of rest;
Should I—who knoweth?—not be deaf, though dumb,
Bird's idle pipe, or bee's laborious hum,
Would suit me, listening, best.
"A Last Request" by Alfred Austin
And one from his high window, looking down,
Peers at the cloud-white town,
And thinks its island towers are like a dream . . .
It seems an enormous sleeper, within whose brain
Laborious shadows revolve and break and gleam.
"The House Of Dust: Part 01: 08: " by Conrad Potter Aiken
Freedom is poor and laborious; that torch is not safe but hungry,
and often requires blood for its fuel.
You will tame it against it burn too clearly, you will hood it
like a kept hawk, you will perch it on the wrist of Caesar.
"Shine, Republic" by Robinson Jeffers

In news:

Tim Berne 's prodigious discography is mostly stocked with collections of his monumentally scaled compositions, sprawling musical roadmaps for laborious treks through ever-changing landscapes.
Though risotto has a reputation for being laborious, the reality is that it can be mostly painless and totally weeknight friendly.
The oldest—and still the best—way to make most people's favorite pasta sauce need not be the most laborious.
"Unfortunately campaigns are long, laborious processes at times, and there's many a fundraiser," said Romney's campaign manager Matt Rhoades.
It's a laborious task that brings joy to many, and disappointment to others.
This is a lot more important than it seems because it ensures Chang 's movie never feels like an old saw laboriously cutting at the trunk of the status quo.
The laborious act of physical rebuilding and personal recovery becomes a scintillating theme for Joy Castro's compelling mystery fiction debut.
Weeks later, I received an email from Sergi Labori Plana, a 25-year-old in Barcelona who had been shocked to see his picture popping up in blog posts.
However, current single point ultrasonics is a slow laborious process that requires a highly trained specialist.
And what better time to enjoy a laboriously made cocktail than on Labor Day.
At times, since his return from the disabled list a month ago, Nationals reliever Drew Storen has alternated between strong outing and laborious one.
A team of scientists laboriously reviewed decades of research comparing organic fruits and vegetables with those grown the usual way.
It's a laborious ordeal, at least for most.
An inexpensive, if laborious, alternative to replacing or refacing cabinets.
While sometimes expensive, they relieve the cooks of the laborious task of extracting and preparing the ingredient stocks from meats, seafood, and vegetables.

In science:

Hence, only R µαβγ ν,1 (λ)ˇgαν (λ)ˇgγβ (λ) dλ may requires a laborious evaluation. A similar technique reduces the evaluation of σ2 to a simpler one.
On nonparametric and semiparametric testing for multivariate linear time series
Without quantitative data it is hard to prove that a recommendation is effective and efficient. However, deducing best practices is a first step and was very laborious; verifying results was identified as a further step (see Section VII).
Improving the Technical Aspects of Software Testing in Enterprises
Alternatively, customizing tools is possible but very laborious. However, tools should be tailored to fit with business processes and not the other way around.
Improving the Technical Aspects of Software Testing in Enterprises
We illustrate this process schematically in Figure 1, which contrasts the laborious approach to our proposed shortcut approach.
Differentially Private Publication of Sparse Data
Algorithm F I LT ER generates a summary with the same distribution as the laborious approach under high-pass filtering with parameter θ ≥ 1.
Differentially Private Publication of Sparse Data