• WordNet 3.6
    • v expatiate add details, as to an account or idea; clarify the meaning of and discourse in a learned way, usually in writing "She elaborated on the main ideas in her dissertation"
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Webster's Revised Unabridged Dictionary
    • Expatiate To enlarge in discourse or writing; to be copious in argument or discussion; to descant. "He expatiated on the inconveniences of trade."
    • v. t Expatiate To expand; to spread; to extend; to diffuse; to broaden. "Afford art an ample field in which to expatiate itself."
    • Expatiate To range at large, or without restraint. "Bids his free soul expatiate in the skies."
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Century Dictionary and Cyclopedia
    • expatiate To move at large; rove without prescribed limits; wander without restraint.
    • expatiate To enlarge in discourse or writing; be copious in argument or discussion: with on or upon.
    • expatiate To allow to range at large; give free exercise to; expand; broaden.
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Chambers's Twentieth Century Dictionary
    • v.i Expatiate eks-pā′shi-āt to range at large: to enlarge in discourse, argument, or writing
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Webster's Revised Unabridged Dictionary
L. expatiatus, exspatiatus, p. p. of expatiari, exspatiari, to expatiate; ex, out + spatiari, to walk about spread out, fr. spatium, space. See Space
Chambers's Twentieth Century Dictionary
L. exspatiāri, -ātusex, out of, spatiāri, to roam—spatium, space.


In literature:

She was never tired of expatiating on its lovable qualities.
"Lords of the Housetops" by Various
If I had a mind farther to expatiate, I could enlarge upon several instances of like nature, but this one may at present suffice.
"In Praise of Folly Illustrated with Many Curious Cuts" by Desiderius Erasmus
I merely expatiated upon the beauty and salubrity of Nevis, and the elegant comforts of Bath House.
"The Gorgeous Isle" by Gertrude Atherton
He never expatiated (at least, in my hearing) on the doctrines of his creed, and he never condemned anybody else.
"The Works of Robert Louis Stevenson, Volume 9" by Robert Louis Stevenson
Do you like to explain and expatiate?
"How to Analyze People on Sight" by Elsie Lincoln Benedict and Ralph Paine Benedict
Paul now expatiates on the things that call for our gratitude to God the Father.
"Epistle Sermons, Vol. III" by Martin Luther
We shall not expatiate further on this subject.
"Woman under socialism" by August Bebel
Shakspeare and Steele both expatiate on the casualties incident to riding upon hired horses.
"Old Roads and New Roads" by William Bodham Donne
Expatiating on the respective forces of England and France, he strove to prove that neither could gain anything by going to war.
"The Life of Napoleon Bonaparte" by William Milligan Sloane
We shall never make him admire it by expatiating on its beauties.
"In the School-Room" by John S. Hart
This fancy was strengthened in the course of conversation, by his expatiating on the greatness of Racine.
"Harper's New Monthly Magazine, Volume 1, No. 2, July, 1850." by Various
I found their scarlet woolen caps while my friend expatiated upon the delightful privilege of having two such fine little chaps.
"Aliens" by William McFee
It would be going too far to expatiate on this matter.
"A Little Garrison" by Fritz von der Kyrburg
The cleverness and good-looks and goodness of the girls were expatiated upon, but Margret gave no sign of interest.
"An Isle in the Water" by Katharine Tynan
You know I meant to say expatiated.
"Olla Podrida" by Frederick Marryat
However, I will not expatiate.
"Old Friends and New" by Sarah Orne Jewett
He expatiated at great length upon the wealth and the resistless power of the emperor whom he served.
"Hernando Cortez" by John S. C. Abbott
Thereupon he waxed testy, and mightily expatiated to his old friend Canon Lenthall.
"The Triumph of Hilary Blachland" by Bertram Mitford
The seller must always say more, and expatiate more upon his goods, than the buyer.
"Villa Eden:" by Berthold Auerbach
I need not, I think, expatiate upon the dinner which followed.
"Blackwood's Edinburgh Magazine, Volume 62, No. 383, September 1847" by Various

In news:

"Expatiate" for purposes of IRC § 877A(a)(1) includes a US citizen who has committed one of the following expatriating acts with intent to relinquish US citizenship.
Curiously, Clare Dunne, who plays both a gun-toting, IRA-style Octavius and Brutus's wife, Portia, expatiating on the diminished role of women, was better as the man.

In science:

Brignall, Ru ˇskuc, and Vatter apply Theorem 4.5 to show that it is possible to decide whether or not a permutation class contains only finitely many simple permutations, and expatiate upon Lemma 4.3, showing that every long simple permutation contains either a long alternation or a long “oscillation”.
Decomposing simple permutations, with enumerative consequences
Then we expatiate on the particularities that we have had to devise to adapt it to our problem, the most important being the choice of the form of the functions that give rise to the sought-after excitation operators.
Plasmons in simple-metal slabs: a semiclassical approach
For this reason we take a few paragraphs to expatiate on some of their key points.
A Survey of Ultraproduct Constructions in General Topology