covert

Definitions

  • WordNet 3.6
    • adj covert secret or hidden; not openly practiced or engaged in or shown or avowed "covert actions by the CIA","covert funding for the rebels"
    • adj covert (of a wife) being under the protection of her husband "a woman covert"
    • n covert a covering that serves to conceal or shelter something "a screen of trees afforded privacy","under cover of darkness","the brush provided a covert for game","the simplest concealment is to match perfectly the color of the background"
    • n covert a flock of coots
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Webster's Revised Unabridged Dictionary
    • Covert A place that covers and protects; a shelter; a defense. "A tabernacle . . . for a covert from storm.""The highwayman has darted from his covered by the wayside."
    • Covert Covered over; private; hid; secret; disguised. "How covert matters may be best disclosed.""Whether of open war or covert guile."
    • Covert (Zoöl) One of the special feathers covering the bases of the quills of the wings and tail of a bird. See Illust. of Bird.
    • Covert Sheltered; not open or exposed; retired; protected; as, a covert nook. "Of either side the green, to plant a covert alley."
    • Covert (Law) Under cover, authority or protection; as, a feme covert, a married woman who is considered as being under the protection and control of her husband.
    • ***
Century Dictionary and Cyclopedia
    • covert Covered; hidden; private; secret; concealed; disguised.
    • covert Sheltered; not open or exposed: as, a covert place.
    • covert In law, under cover, authority, or protection: said of a married woman. See feme covert, under feme. Synonyms Latent, Occult, etc. See secret.
    • n covert A protection; a shelter; a defense; something that covers and shelters.
    • n covert Something that conceals or hides; a screen; a disguise; a pretext; an excuse.
    • n covert A thicket; a shady place or a hiding-place; a cover for game.
    • n covert Same as coverture, 3.
    • n covert In fowling, a company; a flock.
    • n covert plural In ornithology, feathers covering the bases, or more, of the large feathers of the wing or tail; the tectrices. They are divided into superior and inferior, or upper and lower, coverts. The upper wing-coverts are divided into primary, which overlie the bases of the primaries, and secondary, which overlie the bases of the secondaries. The last-named set are subdivided into the greater coverts, a single row projecting furthest upon the secondaries; the median coverts, a single row coming next in order; and the lesser or least coverts, including all the remainder, without distinction of rows. The secondary coverts are also antebrachial or cubital, being situated upon the forearm; the primary coverts are manual, situated upon the manus. The under wing-coverts and the upper and under tail-coverts are not subdivided. Tail-coverts of either set sometimes project far beyond the tail-feathers, forming, for instance, the gorgeous train of the peacock. The extent to which the upper wing-coverts overlie the secondaries is available as a character in classification; it is least in the Passeres, the highest birds. See tectrices.
    • covert To cover.
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Chambers's Twentieth Century Dictionary
    • adj Covert covered: concealed: secret
    • ***

Quotations

  • Thomas Carlyle
    Thomas%20Carlyle
    “Conviction never so excellent, is worthless until it coverts itself into conduct.”
  • Theodore Roosevelt
    Theodore%20Roosevelt
    “People ask the difference between a leader and a boss. The leader works in the open, and the boss in covert. The leader leads, and the boss drives.”

Etymology

Webster's Revised Unabridged Dictionary
OF. covert, F. couvert, p. p. of couvrir,. See Cover (v. t.)
Chambers's Twentieth Century Dictionary
Fr. couvrir (It. coprire)—L. co-operīrecon, and operīre, to cover.

Usage

In literature:

Mark the covert smile on that face, as if he were really laughing at us now.
"Frank Merriwell's Bravery" by Burt L. Standish
He shot a covert glance at the general walking at his side.
"The Doctor of Pimlico" by William Le Queux
Capricious, cruel was his face; in his eyes shone covert enjoyment of the situation.
"Under the Rose" by Frederic Stewart Isham
The officers reseated themselves and resumed their interrupted chat, glancing covertly at Nancy as often as they could.
"The Lost Despatch" by Natalie Sumner Lincoln
On the other side the great bull suddenly rises in front of us and strides on into thicker covert.
"The Western World" by W.H.G. Kingston
Bears, hidden in their coverts, gazed at him with curious eyes.
"The Eyes of the Woods" by Joseph A. Altsheler
He made a jump off the right-of-way, and as the handcar flashed by he watched its flight from the covert of a weed tangle.
"The Escape of Mr. Trimm" by Irvin S. Cobb
Were there foxes in the coverts?
"Ralph the Heir" by Anthony Trollope
He drew himself to the edge of the covert and he did it with so much skill that not a leaf or a blade of grass rustled.
"The Keepers of the Trail" by Joseph A. Altsheler
Among those bleak rampikes and rocks and dark coverts he might find a range to his liking.
"The Watchers of the Trails" by Charles G. D. Roberts
Ruth watched him covertly during the meal, and was delighted to find his conduct faultless.
"The Range Boss" by Charles Alden Seltzer
Harlan looked covertly at Barbara.
"'Drag' Harlan" by Charles Alden Seltzer
For autumn and spring the tan covert coat is in vogue.
"The Complete Bachelor" by Walter Germain
Only for a moment does it appear in sight, then plunges into another covert.
"Our Bird Comrades" by Leander S. (Leander Sylvester) Keyser
They flew right across the south front of the house to a covert on the west side.
"The Strange Case of Mortimer Fenley" by Louis Tracy
In drawing a strong covert, a young bitch gave tongue very freely, whilst none of the other hounds challenged.
"Anecdotes of Dogs" by Edward Jesse
Belle and Hortense met her with covert smiles.
"The Girl from Sunset Ranch" by Amy Bell Marlowe
Halstead ate hurriedly, with covert glances around.
"When Life Was Young" by C. A. Stephens
He made no mistakes; his suggestions held no covert significance, his praise was never extravagant.
"The Orchard of Tears" by Sax Rohmer
Here and there, a revolver was covertly returned to place.
"The Plow-Woman" by Eleanor Gates
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In poetry:

O lead me to the rock
That's high above my head,
And make the covert of thy wings
My shelter and my shade.
"Psalm 61" by Isaac Watts
Ferns and roses, who shall say
What you witness day by day?
Covert smile or dropping eye,
As the monks go pacing by.
"The Monk's Walk" by Paul Laurence Dunbar
Wearied, and faint, and cold, and wet,
To shelter he did hie;
'Beneath the covert of this rock,
My daughter, let us die!'
"A Tale" by John Logan
He loves when some clear soaring mind
Is drawn by mutual piety
To simple souls and unrefined,
Who in life's shadiest covert lie.
"St. Simon And St. Jude" by John Keble
Sing when thou wilt, enchantment fleet,
I leave thy covert haunt untrod,
And envy Science not her feat
To make a twice-told tale of God.
"The Foot-Path" by James Russell Lowell
Discordant music, jarring the nice ear
Of dryad, nymph and faun,
Who, coming from their woodland haunts to hear,
Back to their covert ran.
"In Tempe" by Alexander Anderson

In news:

USA Renews 'Royal Pains,' 'White Collar,' ' Covert Affairs'.
USA has renewed three of its top summer series, on Tuesday picking up additional seasons of Royal Pains, White Collar and Covert Affairs.
"White Collar," "Royal Pains" and " Covert Affairs".
USA has renewed Royal Pains, White Collar and Covert Affairs.
Now, Coward 's letters and Day's excellent commentary have pulled a fair amount of the covert nitty-gritty out of the archival murk.
Ekoostik Hookah and Covert Operations.
Cubicle Cupids No Longer Covert.
'Friday Night Lights,' ' Drop Dead Diva,' 'Covert Affairs' and 'Mad Men' all set for returns.
"Friday Night Lights," " Drop Dead Diva," "Covert Affairs" and "Mad Men.
'Friday Night Lights,' 'Drop Dead Diva,' 'Covert Affairs' and 'Mad Men' all set for returns.
"Friday Night Lights," "Drop Dead Diva," "Covert Affairs" and "Mad Men.
After 15 years in the Shamrock Building on Green River Road, the Evansville Duplicate Bridge Club gets a bigger play area on Covert Avenue near Green River Road.
But, the ever ingenious Republicans reverted to covert tactics to intimidate voters.
C7 Corvette caught during high-speed test runs, up close during covert tests on side roads, and at a complete standstill with windows down and rear hatch raised.
Covert CIA drone strikes have killed a series of senior al-Qaida and Taliban leaders in Pakistan's tribal region over the past few years.
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In science:

Therefore, if the relay immediately following a source node is covert, the source node could transmit at the maximum rate possible to minimize packet losses.
Anonymous Networking amidst Eavesdroppers
Deterministic Covert Scheduling: A direct optimization of (17) provides a deterministic strategy to characterize achievable sum-rates under anonymity constraints.
Anonymous Networking amidst Eavesdroppers
B of relays is chosen to remain covert for all sessions, such that the sum-rate is maximized without violating the anonymity requirement.
Anonymous Networking amidst Eavesdroppers
Depending on the level of anonymity required, the strategy picks one subset of nodes that are always covert (for all sessions).
Anonymous Networking amidst Eavesdroppers
Randomized Covert Scheduling: The drawback in the strategies discussed above is that the subset B is chosen independent of the session S.
Anonymous Networking amidst Eavesdroppers
The generalized strategy is to chose the set of covert relays as a random function of the session S.
Anonymous Networking amidst Eavesdroppers
We model the set of covert relays B as a random variable with a conditional probability mass function {q(B|S) : B ∈ 2V }.
Anonymous Networking amidst Eavesdroppers
The loss function d(S, ˆS) represents the reduction in sum-rate due to covert relaying.
Anonymous Networking amidst Eavesdroppers
Although the loss function parameters do not explicitly include the set of covert relays B, it can be shown that given S, ˆS, the set of covert relays B is unique (see proof of Theorem 4).
Anonymous Networking amidst Eavesdroppers
Therefore, the distribution q(B|S) to chose covert relays is equivalent to the distortion minimizing distribution in (19).
Anonymous Networking amidst Eavesdroppers
The equivalence between anonymous networking and rate distortion is not tied to our strategy of choosing covert relays, as explained in Section I-A.
Anonymous Networking amidst Eavesdroppers
For example, in our setup, the BlahutArimoto algorithm provides an efficient iterative techniqu e to obtain the optimal distribution of covert relays in a session.
Anonymous Networking amidst Eavesdroppers
The figure clearly demonstrates the performance improvement du e to the randomized covert scheduling.
Anonymous Networking amidst Eavesdroppers
Another interesting observation is that it suffices to make relays M2 , M4 covert in order to obtain perfect anonymity.
Anonymous Networking amidst Eavesdroppers
This shows that, although making all relays covert ensures perfect secrecy, it may not be necessary.
Anonymous Networking amidst Eavesdroppers
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