one of the groups or classes into which things may be or have been classified.
Biology. the assignment of organisms to groups within a system of categories distinguished by structure, origin, etc. The usual series of categories is phylum (or, especially in botany, division), class, order, family, genus, species, and variety.
the category, as restricted, confidential, secret, or top secret, to which information, a document, etc., is assigned, as by a government or military agency, based on the degree of protection considered necessary to safeguard it from unauthorized use.
Library Science. any of various systems for arranging books and other materials, especially according to subject or format.
- clas·si·fi·ca·to·ry [kluh-sif-i-kuh-tawr-ee, -tohr-ee, klas-uh-fi- or, especially British, klas-uh-fi-key-tuh-ree], /kləˈsɪf ɪ kəˌtɔr i, -ˌtoʊr i, ˈklæs ə fɪ- or, especially British, ˌklæs ə fɪˈkeɪ tə ri/, adjective
- cla·si·fi·ca·to·ri·ly, adverb
- clas·si·fi·ca·tion·al, adjective
- mis·clas·si·fi·ca·tion, noun
- non·clas·si·fi·ca·tion, noun
- o·ver·clas·si·fi·ca·tion, noun
- pre·clas·si·fi·ca·tion, noun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
How to use classification in a sentence
This week, we’re looking at the latest developments in the battle over the classification of gig workers, the rise of labor unions in tech and and Instagram’s latest move to be woke.Human Capital: The battle over the fate of gig workers continues | Megan Rose Dickey | September 11, 2020 | TechCrunch
It would soon become clear that this classification was, at best, misleading.The Mess That Is the 2020 James Beard Awards, Explained | Elazar Sontag | September 11, 2020 | Eater
Mathematicians pursue this classification with “cohomology” theories, which allow them to extract algebraic fingerprints from complicated geometric spaces.The Mathematical Structure of Particle Collisions Comes Into View | Charlie Wood | August 20, 2020 | Quanta Magazine
These two companies have been sued many, many times for their labor practices, specifically as they pertain to the classification of their respective drivers as independent contractors.Human Capital: Uber and Lyft’s ongoing battle with the law and a brief history of diversity at Snap | Megan Rose Dickey | August 7, 2020 | TechCrunch
These classifications may be revisited if a sponsor ceases engaging in this behavior.
Yet much of the best new music defies genre classification; great artists take chances and cross boundaries.Five Lessons the Faltering Music Industry Could Learn From TV | Ted Gioia | August 3, 2014 | THE DAILY BEAST
Still, Wallace said that no one at the meeting involving Fearey, which he also attended, raised classification concerns.
“The classification system, of course, is not supposed to be used for political purposes,” Bunn said.
But Doyle said Fearey never raised any concerns about classification.
Lambic represents the parent classification for a host of sub-categories.
His hero, Gulliver, discovers race after race of beings who typify the genera in his classification of mankind.Gulliver's Travels | Jonathan Swift
In addition to the tolls and charges, the Acts usually contained a rough classification of goods to which they applied.Fifty Years of Railway Life in England, Scotland and Ireland | Joseph Tatlow
When the child entered the workhouse it passed out of its former classification and entered into an entirely different one.English Poor Law Policy | Sidney Webb
By 1860 it "had given instructions that every new workhouse should be so constructed as to allow of the requisite classification."English Poor Law Policy | Sidney Webb
In some later writers on music we find this classification reduced to a more regular form, and clothed in technical language.The Modes of Ancient Greek Music | David Binning Monro
British Dictionary definitions for classification
systematic placement in categories
one of the divisions in a system of classifying
the placing of animals and plants in a series of increasingly specialized groups because of similarities in structure, origin, molecular composition, etc, that indicate a common relationship. The major groups are domain or superkingdom, kingdom, phylum (in animals) or division (in plants), class, order, family, genus, and species
the study of the principles and practice of this process; taxonomy
government the designation of an item of information as being secret and not available to people outside a restricted group
- classificational, adjective
- classificatory, adjective
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Scientific definitions for classification
The systematic grouping of organisms according to the structural or evolutionary relationships among them. Organisms are normally classified by observed similarities in their body and cell structure or by evolutionary relationships based on the analysis of sequences of their DNA. See more at cladistics Linnean. See Table at taxonomy.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.