• WordNet 3.6
    • n assertion a declaration that is made emphatically (as if no supporting evidence were necessary)
    • n assertion the act of affirming or asserting or stating something
    • ***
Webster's Revised Unabridged Dictionary
    • Assertion Maintenance; vindication; as, the assertion of one's rights or prerogatives.
    • Assertion The act of asserting, or that which is asserted; positive declaration or averment; affirmation; statement asserted; position advanced. "There is a difference between assertion and demonstration."
    • ***
Century Dictionary and Cyclopedia
    • n assertion The act of setting free; liberation.—2. The action of maintaining a cause or a claim: as, the assertion of one's rights.—3. The act of stating something to be true.
    • n assertion A positive declaration or averment; an unsupported statement or affirmation: as, his assertion proved to be false.
    • n assertion Synonyms Vindication, defense, maintenance.3 and Statement, asseveration, protestation.
    • ***
Chambers's Twentieth Century Dictionary
    • Assertion affirmation: the act of claiming one's rights: averment
    • ***


  • Ralph Waldo Emerson
    “Flowers are a proud assertion that a ray of beauty out-values all the utilities of the world.”
  • John Heywood
    John Heywood
    “The loss of wealth is loss of dirt, as sages in all times assert; The happy man's without a shirt.”
  • Georg Hegel
    “When liberty is mentioned, we must always be careful to observe whether it is not really the assertion of private interests which is thereby designated.”
  • V. S. Pritchett
    V. S. Pritchett
    “The Canadian spirit is cautious, observant and critical where the American is assertive.”
  • King Jr. Martin Luther
    “The past is prophetic in that it asserts loudly that wars are poor chisels for carving out peaceful tomorrows.”
  • James A. Froude
    “Philosophy goes no further than probabilities, and in every assertion keeps a doubt in reserve.”


Webster's Revised Unabridged Dictionary
L. assertio, fr. asserere,
Chambers's Twentieth Century Dictionary
L. asserĕre (superl. assertum), aliquem manu in libertatem, to lay hands on a slave in token of manumission, hence to protect, affirm, declare—ad, to, and serĕre, to join. Cf. Series.


In literature:

It never would be credited if asserted.
"Japhet, In Search Of A Father" by Frederick Marryat
We may safely assert that the preacher deals with absolute values, for all art does that.
"Preaching and Paganism" by Albert Parker Fitch
I assert, with Bacon, that all human understanding arises from the world of sensations.
"The Turtles of Tasman" by Jack London
If you honestly can, assert convictions as your conclusions.
"The Art of Public Speaking" by Dale Carnagey (AKA Dale Carnegie) and J. Berg Esenwein
Strange that the assertion should need making!
"Essays on Education and Kindred Subjects" by Herbert Spencer
Comrades they might be, but he held a vested right in her, whether he chose to assert it or not.
"The Safety Curtain, and Other Stories" by Ethel M. Dell
If we make this assertion we make it on grounds other than the facts as presented in Shakespeare's tragedies.
"Shakespearean Tragedy" by A. C. Bradley
We can assert that the general character of Nature is uniformity, but we cannot go beyond this.
"The Relations Between Religion and Science" by Frederick, Lord Bishop of Exeter
There are men who cannot guard themselves from the assertion of marital rights at most inappropriate moments.
"Phineas Finn" by Anthony Trollope
It nowhere asserts (but the direct contrary is positively asserted) that the magistrate has any power whatever over property.
"The Works of the Right Honourable Edmund Burke, Vol. XI. (of 12)" by Edmund Burke

In poetry:

Heaven be in thy inmost ken,
Thou that nobly darest
To assert that men are men
When the garb is barest!
"A Parody On "The Wayside Well"" by Janet Hamilton
"Will trousers, such as yours, array
Extremities inferior?
Will chubbiness assert its sway
All over my exterior?
"Bob Polter" by William Schwenck Gilbert
The ever-ready victims they,
Of logical illusions,
And in a self-assertive way
They jump at strange conclusions.
"The Periwinkle Girl" by William Schwenck Gilbert
And when deny'd this sweet relief,
Canst thou assert full well,
His hiding is thy greatest grief,
Thy Husband's absence hell?
"The Believer's Jointure : Chapter II." by Ralph Erskine
The allotment of death.
For the one path of my flight is direct
Through the bones of the living.
No arguments assert my right:
"Hawk Roosting" by Ted Hughes
But genius will assert its right
To speak a word, or chant a lay,
And thou, with independent might,
Asserted it from day to day.
"Robert Burns" by Thomas Frederick Young

In news:

Mitt Romney assails President Obama's proposal to create a secretary of business in the Cabinet, while Obama counters the Republican's assertions about the auto industry.
Summer's here, regardless of the assertion on the calendar that it's still a good week away.
Boy Scouts Assert ' Good Faith Effort' to Protect Youths.
Frisée and radicchio are both assertive, slightly bitter greens that add color and texture to any salad.
While I am charged with reviewing each comment before posting it on the blog, if only to weed out the occasional exuberant profanity, there isn't time to respond to the more ludicrous assertions.
Did you feel at any point as though you were being exploited to assert Prince's heterosexuality.
Thinking of God helps people to assert self-control—even if they're atheists.
Insight magazine is standing by its article asserting that Sen Barack Obama attended a school that teaches a fundamentalist version of Islam.
Prominent economists assert that there will be 12 million jobs created in the next four years regardless of who is elected.
Man in auto accident seeks benefits for knee and back injuries – Carrier asserts there was no herniated disc as result of accident.
Carrier asserts there was no herniated disc as result of accident.
When half a dozen students in Neil Waters's Japanese history class at Middlebury College asserted on exams that the Jesuits supported the Shimabara Rebellion in 17th-century Japan, he knew something was wrong.
Woman's claimed injuries reflect assertions used in other case, defense says.
A Ventura County Grand Jury report asserts that the City of Thousand Oaks may be charging an unreasonable vehicle impound fee.
The head of the United Nations' refugee agency said today that she was pleased that the United States was finally asserting leadership in the Zairian crisis.

In science:

Proof: We show the first assertion (the second assertion is shown in the same way).
Infinite dimensional representations of canonical algebras
Since add q is closed both under extensions and under factor modules, Lemma 4 asserts that g (q) is closed under extensions.
Infinite dimensional representations of canonical algebras
Condition (F) asserts that Z ′ = Y ′′ /(X + U ) is of finite length.
Infinite dimensional representations of canonical algebras
These two assertions are equivalent, thus it is sufficient to verify one of them.
Infinite dimensional representations of canonical algebras
But actually, both follow directly from the assertion Hom(q, t) = 0.
Infinite dimensional representations of canonical algebras