different between group vs realm

English

Alternative forms

• groop (non-standard)
• groupe (obsolete)

Etymology

From French groupe (“cluster, group”), from Italian gruppo, groppo (“a knot, heap, group, bag (of money)”), from Vulgar Latin *cruppo, Renaissance Latin grupus, from Proto-Germanic *kruppaz (“lump, round mass, body, crop”), from Proto-Indo-European *grewb- (“to crumple, bend, crawl”). Cognate with German Kropf (“crop, craw, bunch”), Old English cropp, croppa (“cluster, bunch, sprout, flower, berry, ear of corn, crop”), Dutch krop (“craw”), Icelandic kroppr (“hump, bunch”). Doublet of crop and croup.

Pronunciation

• enPR: gro?op, IPA^(key): /??u?p/
• Rhymes: -u?p

Noun

group (plural groups)

1. A number of things or persons being in some relation to one another.

2. (group theory) A set with an associative binary operation, under which there exists an identity element, and such that each element has an inverse.
   • 1977, Roger C. Lyndon, Paul E. Schupp, Combinatorial Group Theory, Springer, page 192,

     Throughout this section, we shall assume the existence of finitely presented groups with unsolvable word problem.

   • 1992, Svetlana Katok, Fuchsian Groups, University of Chicago Press, page 112,

     In this chapter we give some examples of Fuchsian groups. The most interesting and important ones are the so-called "arithmetic" Fuchsian groups, i.e., discrete subgroups of PSL(2,R) obtained by some "arithmetic" operations. One such construction we have already seen: if we choose all matrices of SL(2,R) with integer coefficients, then the corresponding elements of PSL(2,R) form the modular group PSL(2,Z).

   • 2007, Zhong-Qi Ma, Group Theory for Physicists, World Scientific, page 277,

     In Chap. 4 the fundamental concepts on Lie groups have been introduced through the SO(3) group and its covering group SU(2).

3. (geometry, archaic) An effective divisor on a curve.
4. A (usually small) group of people who perform music together.

5. (astronomy) A small number (up to about fifty) of galaxies that are near each other.
6. (chemistry) A column in the periodic table of chemical elements.
7. (chemistry) A functional group.

8. (sociology) A subset of a culture or of a society.
9. (military) An air force formation.
10. (geology) A collection of formations or rock strata.
11. (computing) A number of users with same rights with respect to accession, modification, and execution of files, computers and peripherals.
12. An element of an espresso machine from which hot water pours into the portafilter.
13. (music) A number of eighth, sixteenth, etc., notes joined at the stems; sometimes rather indefinitely applied to any ornament made up of a few short notes.
14. (sports) A set of teams playing each other in the same division, while not during the same period playing any teams that belong to other sets in the division.
15. (business) A commercial organization.

Synonyms

• (number of things or persons being in some relation to each other): collection, set
• (people who perform music together): band, ensemble
• See also Thesaurus:group

Hypernyms

• (in group theory): monoid

Hyponyms

Derived terms

• subgroup

Related terms

Descendants

• ? Gulf Arabic: ?????
• ? Japanese: ???? (gur?pu)
• ? Korean: ?? (geurup)
• ? Tongan: kulupu

Translations

References

• group on Wikipedia.Wikipedia

Verb

group (third-person singular simple present groups, present participle grouping, simple past and past participle grouped)

1. (transitive) To put together to form a group.

   group the dogs by hair colour

2. (intransitive) To come together to form a group.

Synonyms

• (put together to form a group): amass, categorise/categorize, classify, collect, collect up, gather, gather together, gather up; see also Thesaurus:round up
• (come together to form a group): assemble, begather, foregather, throng; see also Thesaurus:assemble

Translations

Further reading

• group in Webster’s Revised Unabridged Dictionary, G. & C. Merriam, 1913.
• group in The Century Dictionary, New York, N.Y.: The Century Co., 1911.

English

Etymology

From Middle English rewme, realme, reaume, from Old French reaume, realme (“kingdom”), of unclear origins. A postulated *r?g?limen (“domain, kingdom”), Late Latin or Vulgar Latin cross of r?gimen with r?g?lis is usually cited.

Pronunciation

• (UK, US) enPR: r?lm, IPA^(key): /??lm/
• Rhymes: -?lm

Noun

realm (plural realms)

1. An abstract sphere of influence, real or imagined.
   • 1907, Tada Kanai, translated by Arthur Lloyd, Seven Buddhist Sermons, "The World and How to Pass Through It"

     Why should we despise anything in the realm of Buddha?

   • 2006, Christian Neef, "Diary of a Collapsing Superpower", Spiegel Magazine, November 22,

     At home in Moscow, Mikhail Sergeyevitch Gorbachev, who had launched a campaign to rejuvenate the Soviet realm  […]
2. The domain of a certain abstraction.
   • 1922, Judson Eber Conant,The Church The Schools and Evolution, "Truth Must be Classified Scientifically",

     One thing more which the scientific man does is to accord primacy to that realm of truth which is primary in importance.

3. (computing) A scope of operation in networking or security.
4. (formal or law) A territory or state, as ruled by a specific power, especially by a king.
   • 1874, Horatio Alger, Brave and Bold, Chapter XXXI,

     And, of this island realm, he and his companion were the undisputed sovereigns.

   • 1913, Leslie Alexander Toke, Catholic Encyclopedia, "St. Dunstan",

     Then seeing his life was threatened he fled the realm and crossed over to Flanders, […]

5. (fantasy, role-playing games) An otherworldly dimension or domain — magical, ethereal, or otherwise — usually ruled or created by a mystical character.
6. (virology, taxonomy) A taxonomic rank in the phylogeny of viruses, higher than kingdoms.

Synonyms

• (a territory or state): country, land, kingdom
• (a sphere of activity or influence): field, province

Derived terms

Translations

Anagrams

• Almer, Lamer, Lemar, Lerma, Maler, lamer, maerl, maler, marle, meral