Noun

(countable, uncountable) Knowledge that is hidden and intended to be kept hidden.

* {{quote-magazine, date=2013-06-14, author=(Jonathan Freedland)

, volume=189, issue=1, page=18, magazine=(The Guardian Weekly) , title= Obama's once hip brand is now tainted , passage=Now we are liberal with our innermost secrets , spraying them into the public ether with a generosity our forebears could not have imagined. Where we once sent love letters in a sealed envelope, or stuck photographs of our children in a family album, now such private material is despatched to servers and clouds operated by people we don't know and will never meet.}}

* Rambler

To tell our secrets is often folly; to communicate those of others is treachery.

(uncountable) Something not understood or known.

* Milton

All secrets of the deep, all nature's works.

(archaic, in the plural) The genital organs.

Noun

(wikipedia world)

Human collective existence; existence in general.

* {{quote-book, year=1922, author=(Michael Arlen), title= “Piracy”: A Romantic Chronicle of These Days, chapter=Ep./4/2

, passage=The world' was awake to the 2nd of May, but Mayfair is not the ' world , and even the menials of Mayfair lie long abed. As they turned into Hertford Street they startled a robin from the poet's head on a barren fountain, and he fled away with a cameo note.}}

* {{quote-book, year=1963, author=(Margery Allingham), title=(The China Governess)

, chapter=9 citation , passage=Eustace gaped at him in amazement. When his urbanity dropped away from him, as now, he had an innocence of expression which was almost infantile. It was as if the world had never touched him at all.}}

* {{quote-magazine, date=2013-06-01, volume=407, issue=8838, page=11, magazine=(The Economist)

, title= Towards the end of poverty , passage=America’s poverty line is $63 a day for a family of four. In the richer parts of the emerging world $4 a day is the poverty barrier. But poverty’s scourge is fiercest below $1.25 ([…]): people below that level live lives that are poor, nasty, brutish and short.}}

The Universe.

The Earth.

*

Serene, smiling, enigmatic, she faced him with no fear whatever showing in her dark eyes.She put back a truant curl from her forehead where it had sought egress to the world , and looked him full in the face now, drawing a deep breath which caused the round of her bosom to lift the lace at her throat.

* {{quote-magazine, year=2013, month=May-June, author= William E. Conner

, title= An Acoustic Arms Race , volume=101, issue=3, page=206-7, magazine=(American Scientist) , passage=Earless ghost swift moths become “invisible” to echolocating bats by forming mating clusters close

(lb) A planet, especially one which is inhabited or inhabitable.

* 2007 September 27, Marc Rayman (interviewee), “ NASA's Ion-Drive Asteroid Hunter Lifts Off”, National Public Radio :

I think many people think of asteroids as kind of little chips of rock. But the places that Dawn is going to really are more like worlds .

An individual or group perspective or social setting.

* {{quote-magazine, date=2013-06-08, volume=407, issue=8839, page=55, magazine=(The Economist)

, title= Obama goes troll-hunting , passage=According to this saga of intellectual-property misanthropy, these creatures [patent trolls] roam the business world , buying up patents and then using them to demand extravagant payouts from companies they accuse of infringing them. Often, their victims pay up rather than face the costs of a legal battle.}}

(lb) A great amount.