Group



GRE 考研

解释

GRE 红宝书

• v. 使...集合; 群, 集
• ［英］ v. 使...集合 ( gather sb / sth into groups)
• ［类］ stray : group / digress : subject ( 离群是离开群体 / 离题是离开主题) 反义词: isolate ( 分开)
• ［例］ The police grouped themselves round the demonstrators.

Webster Collegiate

I. noun

• Usage: often attributive
• Etymology: French groupe, from Italian gruppo, by-form of groppo knot, tangle, of Germanic origin; akin to Old High German kropf craw — more at crop
• Date: 1686
• 1. two or more figures forming a complete unit in a composition
• 2.
  • a. a number of individuals assembled together or having some unifying relationship
  • b. an assemblage of objects regarded as a unit
  • c.
    • (1) a military unit consisting of a headquarters and attached battalions
    • (2) a unit of the United States Air Force higher than a squadron and lower than a wing
• 3.
  • a. an assemblage of related organisms — often used to avoid taxonomic connotations when the kind or degree of relationship is not clearly defined
  • b.
    • (1) two or more atoms joined together or sometimes a single atom forming part of a molecule; especially functional group <a methyl group>
    • (2) an assemblage of elements forming one of the vertical columns of the periodic table
  • c. a stratigraphic division comprising rocks deposited during an era
• 4. a mathematical set that is closed under a binary associative operation, contains an identity element, and has an inverse for every element

II. verb

• Date: 1718
• transitive verb
  • 1. to combine in a group
  • 2. to assign to a group ; classify
• intransitive verb
  • 1. to form a group
  • 2. to belong to a group
  • 3. to make groups of closely spaced hits on a target <the gun grouped beautifully — R. C. Ruark>
• ? groupable adjective

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