• WordNet 3.6
    • adj tireless characterized by hard work and perseverance
    • adj tireless showing sustained enthusiastic action with unflagging vitality "an indefatigable advocate of equal rights","a tireless worker","unflagging pursuit of excellence"
    • ***
Webster's Revised Unabridged Dictionary
    • a Tireless Untiring.
    • ***
Century Dictionary and Cyclopedia
    • tireless Not tiring or becoming tired; not yielding to fatigue; untiring; unwearying.
    • tireless Without a tire: as, a tireless wheel.
    • ***
Chambers's Twentieth Century Dictionary
    • adj Tireless untiring
    • ***


  • Mao Zedong
    “Our attitude towards ourselves should be to be satiable in learning and towards others to be tireless in teaching.”
  • Adlai E. Stevenson
    “The sound of tireless voices is the price we pay for the right to hear the music of our own opinions.”


Chambers's Twentieth Century Dictionary
A.S. teorian, to be tired—teran, to tear.


In literature:

They were splendid animals in harness, well broken and tireless travelers on the trail.
"The Story of Grenfell of the Labrador" by Dillon Wallace
What avail the tireless labor of the machine and the mountains of material it places upon the market, if there are no purchasers?
"Black and White" by Timothy Thomas Fortune
The strong men stride tirelessly without a word.
"Adventures of a Despatch Rider" by W. H. L. Watson
Two clergymen were especially tireless in their desire to reform this sterling reformer.
"Greenwich Village" by Anna Alice Chapin
Mrs. Warren with a tireless pen combatted loyalist propaganda in many a drama and satire.
"History of the United States" by Charles A. Beard and Mary R. Beard
The tireless hum of insects made murmurous music all about him.
"The Sheriff's Son" by William MacLeod Raine
Now she suffered the penalty and dozed, but her companion was very wide awake, being a tireless creature who knew not lethargy.
"The Half-Hearted" by John Buchan
Raoul marvelled that a woman, apparently delicate, should be possessed of such tireless energy.
"The Argosy" by Various
In the activities that have wrought these changes, he was always the first and last to work with tireless zeal.
"Destiny" by Charles Neville Buck
He prefers to drive the tireless engine than to whip the straining horses.
"Creative Chemistry" by Edwin E. Slosson

In poetry:

To fill a new Colossus-mould.
When tireless unbelief hath sent;
Thy truest Image to the cold
Pure mountain-tops of banishment,
"The Magi To The Star" by Mary Hannay Foott
No more his tireless thought explores
The azure sea with golden shores;
Rest, wearied frame I the stars shall keep
A loving watch where thou shalt sleep.
"Benjamin Peirce" by Oliver Wendell Holmes
His, too, is finish'd; but, before the dust
Be hidden, let us look upon this man,
That his life energy and tireless trust
May be ours also as we work our span.
"By The Grave of Livingstone" by Alexander Anderson
I in the trench, he lost in heaven afar,
I dream of Love, its ecstasy he sings;
Doth lure my soul to love till like a star
It flashes into Life: O tireless wings
"A Lark above the Trenches" by John William Streets
All this I heard--or seemed to hear--half blending
With the low murmur of the coming breeze,
The call of some lost bird, and the unending
And tireless sobbing of those grassy seas.
"The Station-Master Of Lone Prairie" by Francis Bret Harte
They are tireless folk, but slow and sad,
Though two, close-keeping, are lass and lad,—
With none among them that ever sings,
And yet, in view of how many things,
As sweet companions as might be had.
"Ghost House" by Robert Frost

In news:

Spending long, tireless hours on the basketball court was nothing new for Jordan Henry.
Woods was caught on camera trying to grab the young girl, who tirelessly kicked and screamed until he let her go.
Sculptor Troy Kelley spends his days tirelessly working on tributes to the 13 people who died in the mass shooting at Fort Hood on November 5, 2009.
Tireless, selfless work at heart of successful program.
McBride a tireless community servant .
We would just like to ffer our sincere thanks to the workers who have tirelessly been doing their best to restore power.
This weekend's tireless rain left its mark on my house, specifically in my basement.
He moved swiftly through the ranks and worked tirelessly to fulfill a childhood dream of starting in the Indy 500.
The CSF works tirelessly to fend off the many and varied attacks on hunting and fishing, and they also promote our sports by constantly working to attract new participants.
Showing Tireless Speed, Giants Rookie Gets Second Shot.
Giuliana Rancic became a first-time parent in August, and already she's working tirelessly to retain her "hot mom" status .
Phil Meyer, operations manager of the Whitman County Public Works Department, searches tirelessly for the most cost-effective roadside management tools.
The president of the United States breaking down in tears as he thanked campaign workers for their tireless work for his re-election.
Congratulations to all of our fine athletes who worked so tirelessly to bring home the gold, silver and bronze from London.
Tireless on the Left, The Great I.F.

In science:

We thank the FUSE team at Johns Hopkins University for their tireless efforts to develop, operate, and support this productive facility.
Exploring the Origin and Fate of the Magellanic Stream with Ultraviolet and Optical Absorption
All scientific knowledge is conjectural in character, as Karl Popper tirelessly argued.10 This applies to physicalism too, of course.
Do We Need a Scientific Revolution?
The conveners and authors of the working group on QCD and Strong Interactions thank the Organizing Committees of Snowmass 2001 for their tireless work, and for the many invitations, reminders and encouragements that made the meeting and this report possible.
Summary: Working Group on QCD and Strong Interactions
Sincere thanks go to Jean Tran Thanh Van for his tireless effort to create Rencontres du Vietnam and his kind friendship over about 40 years.
Summary Talk: Challenges in Particle Astrophysics
Finally, let me remark that the excellent atmosphere conducive to the discussion of these problems at length would not have been possible without the tireless work of the local organizers.
Summary of the Nijmegen Workshop on Multiparticle Production