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1. WordNet® 3.0 (2006) |
black hole
n 1: a region of space resulting from the collapse of a star;
extremely high gravitational field
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2. The Collaborative International Dictionary of English v.0.48 |
black hole \black" hole`\
A dungeon or dark cell in a prison; a military lock-up or
guardroom; -- now commonly with allusion to the cell (the
Black Hole) in a fort at Calcutta (called the Black Hole of
Calcutta), into which 146 English prisoners were thrust by
the nabob Suraja Dowla on the night of June 20, 1765, and in
which 123 of the prisoners died before morning from lack of
air.
[1913 Webster]
A discipline of unlimited autocracy, upheld by rods,
and ferules, and the black hole. --H. Spencer.
[1913 Webster]
2. (Physics, Astron.) An astronomical object whose mass is so
condensed that the gravitational force does not allow
anything, even light, to escape from its outer limit (the
event horizon). The existence of such objects was first
proposed from theoretical considerations. Because light
cannot escape from such objects, they have not yet been
detected with certainty (1998), but several "candidates"
have been observed whose properties strongly suggest that
they are black holes. Some theorists suggest that the
centers of many galaxies may have large black holes at
their cores. See also escape velocity.
[PJC]
3. [from the astronomical black hole.] a place into which
things may enter, but can never emerge. [Fig., Jocose] "He
was so disorganized his office was a black hole."
[PJC]
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3. The Jargon File (version 4.4.7, 29 Dec 2003) |
black hole
n.,vt.
[common] What data (a piece of email or netnews, or a stream of TCP/IP
packets) has fallen into if it disappears mysteriously between its origin
and destination sites (that is, without returning a bounce message). ?I
think there's a black hole at foovax!? conveys suspicion that site foovax
has been dropping a lot of stuff on the floor lately (see drop on the
floor). The implied metaphor of email as interstellar travel is
interesting in itself. Readily verbed as blackhole: ?That router is
blackholing IDP packets.? Compare bit bucket and see RBL.
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4. The Free On-line Dictionary of Computing (30 December 2018) |
black hole
1. An expression which depends on its own value or a technique
to detect such expressions. In graph reduction, when the
reduction of an expression is begun, the root of the
expression can be overwritten with a black hole. If the
expression depends on its own value, e.g.
x = x + 1
then it will try to evaluate the black hole which will usually
print an error message and abort the program. A secondary
effect is that, once the root of the expression has been
black-holed, parts of the expression which are no longer
required may be freed for garbage collection.
Without black holes the usual result of attempting to evaluate
an expression which depends on itself would be a stack
overflow. If the expression is evaluated successfully then
the black hole will be updated with the value.
Expressions such as
ones = 1 : ones
are not black holes because the list constructor, : is lazy so
the reference to ones is not evaluated when evaluating ones to
WHNF.
2. Where an electronic mail message or news aritcle has
gone if it disappears mysteriously between its origin and
destination sites without returning a bounce message.
Compare bit bucket.
[Jargon File]
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Thesaurus Results for black hole:
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1. Moby Thesaurus II by Grady Ward, 1.0 |
Beehive, Cepheid variable, Hertzsprung-Russell diagram, Hyades, Messier catalog, NGC, POW camp, Pleiades, Seven Sisters, absolute magnitude, bastille, binary star, borstal, borstal institution, bridewell, brig, cell, concentration camp, condemned cell, death cell, death house, death row, detention camp, double star, dwarf star, federal prison, fixed star, forced-labor camp, gaol, giant star, globular cluster, gravity star, guardhouse, house of correction, house of detention, industrial school, internment camp, jail, jailhouse, keep, labor camp, lockup, magnitude, main sequence star, mass-luminosity law, maximum-security prison, minimum-security prison, neutron star, nova, open cluster, oubliette, pen, penal colony, penal institution, penal settlement, penitentiary, populations, prison, prison camp, prisonhouse, pulsar, quasar, quasi-stellar radio source, radio star, red giant star, reform school, reformatory, relative magnitude, sky atlas, spectrum-luminosity diagram, sponging house, star, star catalog, star chart, star cloud, star cluster, state prison, stellar magnitude, stockade, supernova, the hole, tollbooth, training school, variable star, white dwarf star |
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Common Misspellings > |
black hole lblack hole lback hole blback hole lack hole bblack hole balck hole blalck hole back hole bllack hole blcak hole blacak hole blck hole blaack hole blakc hole blackc hole blak hole blacck hole blac khole black khole blac hole blackk hole blackh ole black h ole blackhole black hole black ohle black hohle black ole black hhole black hloe black holoe black hle black hoole black hoel black holel black hoe black holle black hoele black hol black holee flack hole bflack hole fblack hole glack hole bglack hole gblack hole hlack hole bhlack hole hblack hole vlack hole bvlack hole vblack hole nlack hole bnlack hole nblack hole lack hole b lack hole black hole biack hole bliack hole bilack hole boack hole bloack hole bolack hole bpack hole blpack hole bplack hole bkack hole blkack hole bklack hole b,ack hole bl,ack hole b,lack hole b.ack hole bl.ack hole b.lack hole blqck hole blaqck hole blqack hole blwck hole blawck hole blwack hole blsck hole blasck hole blsack hole blxck hole blaxck hole blxack hole blzck hole blazck hole blzack hole bl ck hole bla ck hole bl ack hole bleck hole blick hole block hole bluck hole blask hole blacsk hole blasck hole bladk hole blacdk hole bladck hole blafk hole blacfk hole blafck hole blaxk hole blacxk hole blaxck hole blavk hole blacvk hole blavck hole bla k hole blac k hole bla ck hole blacu hole blacku hole blacuk hole blaci hole blacki hole blacik hole blaco hole blacko hole blacok hole blacj hole blackj hole blacjk hole blacl hole blackl hole blaclk hole blacm hole blackm hole blacmk hole blac, hole black, hole blac,k hole blac. hole black. hole blac.k hole black tole black htole black thole black yole black hyole black yhole black uole black huole black uhole black gole black hgole black ghole black jole black hjole black jhole black bole black hbole black bhole black nole black hnole black nhole black mole black hmole black mhole black ole black h ole black hole black h9le black ho9le black h9ole black h(le black ho(le black h(ole black h0le black ho0le black h0ole black hile black hoile black hiole black hple black hople black hpole black hkle black hokle black hkole black hlle black holle black hlole black hale black hele black hule black hoie black holie black hoile black hooe black holoe black hoole black hope black holpe black hople black hoke black holke black hokle black ho,e black hol,e black ho,le black ho.e black hol.e black ho.le black hol3 black hole3 black hol3e black hol# black hole# black hol#e black hol4 black hole4 black hol4e black holw black holew black holwe black holr black holer black holre black hols black holes black holse black hold black holed black holde black holf black holef black holfe black hola black holi black holo black holu Definition commonly spelled as: Defanition or Defenition, Synonym as: Synonim, Sinonym or Sinonim, Thesaurus as: Thesorus or Thesauris, Dictionary as: Dictionery or Dictionry and Define is usually not misspelled. What does mispell meen? It Meens...
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