• WordNet 3.6
    • adj opportunist taking immediate advantage, often unethically, of any circumstance of possible benefit
    • n opportunist a person who places expediency above principle
    • ***
Webster's Revised Unabridged Dictionary
    • n Opportunist One who advocates or practices opportunism.
    • ***
Century Dictionary and Cyclopedia
    • n opportunist [capitalized] In French politics, a member of that section of the Republican party which believes in regulating political action in accordance with circumstances, and not by dogmatic principles. This word first came into use in France about 1873. The Opportunists were the party of concession, and occupied an intermediate position between the various groups of monarchists and the Intransigentists, the extreme section of the Republican party. Their leader was Gambetta.
    • n opportunist In general, one who takes advantage of opportunities as they occur; one who waits for an opportune time before attempting to bring into practice or to urge upon others the principles or beliefs which he holds; one who makes the best of circumstances as they arise; hence, one who is without settled principles or consistent policy: opposed to extremist.
    • opportunist Of, pertaining to, or characteristic of the political party known as the Opportunists; hence [lowercase], of or pertaining to opportunism, or the observance of a waiting policy; making the best of circumstances while waiting for a suitable time for the proper carrying out of one's views.
    • ***
Chambers's Twentieth Century Dictionary
    • Opportunist a politician who waits for events before declaring his opinions: a person without settled principles
    • ***


  • Ralph W. Sockman
    Ralph W. Sockman
    “When the dictators and the opportunists are gone, the cross will still stand before us and something in us will say, That is the real thing.”


Webster's Revised Unabridged Dictionary
Cf. F. opportuniste,
Chambers's Twentieth Century Dictionary
Fr.,—L. opportunusob, before, portus, a harbour.


In literature:

The "State Socialist" and Reform attitude towards political democracy is indeed essentially opportunistic.
"Socialism As It Is" by William English Walling
The sheer, compulsive opportunist!
"Ten From Infinity" by Paul W. Fairman
He was, therefore, an opportunist.
"South American Fights and Fighters" by Cyrus Townsend Brady
Throughout a generation the party has grown steadily more practical in its demands and more opportunist in its tactics.
"The Governments of Europe" by Frederic Austin Ogg
M. Ferry is admitted to be the ideal statesman of the Opportunist Republicans now in power.
"France and the Republic" by William Henry Hurlbert
Mr. Shaw's waiter is an opportunist, just as Mr. Shaw is an opportunist in politics.
"Appreciations and Criticisms of the Works of Charles Dickens" by G. K. Chesterton
Tilden was essentially an opportunist.
"A Political History of the State of New York, Volumes 1-3" by DeAlva Stanwood Alexander
Clerk Janaway was inclined to take a distressingly opportunist and matter-of-fact view of the question.
"The Nebuly Coat" by John Meade Falkner
Can't you imagine the mockery opportunists would have made out of it?
"The Servant Problem" by Robert F. Young
Within three weeks of the Russell Memorandum to the Cabinet he accordingly stood out in his true colours as a frank opportunist.
"Lord John Russell" by Stuart J. Reid
At a time before the word was invented he was the first of opportunists.
"The Best of the World's Classics, Restricted to Prose, Vol. X (of X) - America - II, Index" by Various
He regards Mr. Gladstone as having acted under compulsion, and as being an opportunist.
"Ireland as It Is" by Robert John Buckley (AKA R.J.B.)
They were really Opportunists.
"Mlle. Fouchette" by Charles Theodore Murray
In philosophy she was a Platonist, in politics an Opportunist.
"A Critic in Pall Mall" by Oscar Wilde
Daring but sagacious, they followed an opportunist policy.
"The Fighting Governor" by Charles W. Colby
Had she not that very week denounced the opportunist doctrine that the end justifies the means?
"The Preacher of Cedar Mountain" by Ernest Thompson Seton
We won't admit he's just a latter-day tyrant, an opportunist seizing power because it's there crying to be seized.
"Border, Breed Nor Birth" by Dallas McCord Reynolds
Ever an opportunist as to means, Wilfrid Laurier has never been an opportunist as to ends.
"The Day of Sir Wilfrid Laurier" by Oscar D. Skelton
In his relations to the Empire Clement was an opportunist.
"Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 4" by Various
Bicker, our authentic poet, and not an opportunist like Mead, had been proposing a magazine for some little time past.
"The Bonadventure" by Edmund Blunden

In news:

Claim over water ' opportunistic '.
Opportunistic countries ready to cash in on Afghanistan.
Alabama advances to yet another Super Regional thanks to opportunistic baserunning, Jackie Traina's 2-hit gem (video).
Opportunistic Chiefs starting to catch fire.
Virginia secondary looking to be more opportunistic against Idaho.
The definition of " opportunistic crime" should give managers at the LA Sheriff's Department enough reason to restore sworn personnel staffing at our county custody facilities to safe levels.
My opportunist friend tried to convince my box friend it was time to get out of the packaging business.
Pats' D creates opportunistic TOs.
Tim Tebow and the Denver Broncos' comeback train were derailed by an opportunistic Buffalo Bills defense.
"As always, we will look to be opportunistic," said Dolan.
Or maybe you didn't want to know, because it is repugnant and vile and opportunistic.
Opportunistic Chiefs starting to catch fire .
It has taken me forty some-odd years to figure out that I'm a bit of an opportunist.
A local school is reaping the rewards of one parent's opportunistic outlook.
A stingy defense and an opportunistic offense has the Whitefish Bay football team in the third round of the Division 2 playoffs for a second straight season.

In science:

He or she expects the other to refrain from opportunistic behaviour even if there is the possibility to show this behaviour.
The Identity Crisis. Security, Privacy and Usability Issues in Identity Management
Instead, content determination in MultiGen is opportunistic, depending on the kinds of similarities that happen to exist between a set of news documents.
Inferring Strategies for Sentence Ordering in Multidocument News Summarization
Similarly, we describe here an ordering scheme that is opportunistic and bottom-up, depending on the cohesion and temporal connections that happen to exist between selected text.
Inferring Strategies for Sentence Ordering in Multidocument News Summarization
A1(t) and then chooses a set of available channels for opportunistic transmissions based on sensing results.
On Scalable Video Streaming over Cognitive Radio Cellular and Ad Hoc Networks
In each time slot t, the base station opportunistically access every channel n with probability n (t) given in (6).
On Scalable Video Streaming over Cognitive Radio Cellular and Ad Hoc Networks
C ∗ ) belonging to the case of all ∆Ti being equal, leading to M(♥) = 0, and 1 Random probe mean values are known to be opportunist.
A fast unbinned test on event clustering in Poisson processes
Relationalism is an approach we take for opportunistic reasons, it is explicitly a pragmatic philosophy of theory building and we physicists are theory builders; we remain silent about how we are to interpret the theory in the end for that is something we cannot speak of yet.
Weak Values and Relational Generalisations
Erkip, “Opportunistic cooperation by d ynamic resource allocation,” IEEE Trans.
Resource Allocation for Wireless Fading Relay Channels: Max-Min Solution
AODV or OLSR as well as an opportunistic routing protocol, e.g. a routing scheme based on estimated probability of future contact such as Zebranet.
DIP: Disruption-Tolerance for IP
An opportunistic-overtaking matrix O of a permutation matrix P is the product of the reducing matrix of P and the overtaking swaps of P such that, for every inverted block of P , the only rows that O can leave unswapped are the first and the last rows of the block.
Factoring Permutation Matrices Into a Product of Tridiagonal Matrices
The col lection of al l products of P with any of its opportunistic-overtaking matrices O is denoted by OOM(P ) ∋ OP .
Factoring Permutation Matrices Into a Product of Tridiagonal Matrices
It is of interest to compare the factors derived from the approach in , as with the method of Albert, Li and Yu [7, Sec. 4], which is not yet readily available, with the opportunistic-overtaking matrices approach.
Factoring Permutation Matrices Into a Product of Tridiagonal Matrices
These estimates are then used for opportunistically tuning the AP channel access probability or the ACK suppression scheme (by means of γ and α).
MAC design for WiFi infrastructure networks: a game-theoretic approach
Cognitive Radio Networks (CRNs) have recently emerged as a technology for unlicensed users, referred to as secondary users (SUs), to opportunistically utilize the spectrum assigned to licensed users, referred to as primary users (PUs).
Cross-Layer Scheduling for Cooperative Multi-Hop Cognitive Radio Networks
In particular, it has been shown in that the degrees of freedom of such fully-connected layered networks can be achieved using a non-separation scheme called opportunistic interference alignment.
Capacity of Multiple Unicast in Wireless Networks: A Polymatroidal Approach