Princeton's WordNet

1. categorization, categorisation, classification, compartmentalization, compartmentalisation, assortment(noun)

   the act of distributing things into classes or categories of the same type

2. classification, categorization, categorisation(noun)

   a group of people or things arranged by class or category

3. classification, categorization, categorisation, sorting(noun)

   the basic cognitive process of arranging into classes or categories

4. classification(noun)

   restriction imposed by the government on documents or weapons that are available only to certain authorized people

Kernerman English Learner's Dictionary

1. classification(noun)ˌklæs ə fɪˈkeɪ ʃən

   an arrangement into groups

   the scientific classification of diseases

Wiktionary

1. classification(Noun)

   The act of forming into a class or classes; a distribution into groups, as classes, orders, families, etc., according to some common relations or attributes.

Origin: From classification.

Webster Dictionary

1. Classification(noun)

   the act of forming into a class or classes; a distibution into groups, as classes, orders, families, etc., according to some common relations or affinities

U.S. National Library of Medicine

1. Classification

   The systematic arrangement of entities in any field into categories classes based on common characteristics such as properties, morphology, subject matter, etc.

Dictionary of Military and Associated Terms

1. classification

   The determination that official information requires, in the interests of national security, a specific degree of protection against unauthorized disclosure, coupled with a designation signifying that such a determination has been made. See also security classification.

• indeling, klassifikasieAfrikaans
• تَصْنيفArabic
• класификацияBulgarian
• classificaçãoPortuguese (BR)
• klasifikace, (roz)tříděníCzech
• die EinteilungGerman
• kategorisering; inddeling; klassificeringDanish
• ταξινόμησηGreek
• clasificaciónSpanish
• liigitusEstonian
• طبقه بندیFarsi
• luokitusFinnish
• classificationFrench
• סִווּג ,סִיווּגHebrew
• वर्गीकरणHindi
• klasifikacija, razvrstavanjeCroatian
• osztályozásHungarian
• klasifikasiIndonesian
• flokkunIcelandic
• classificazioneItalian
• 分類Japanese
• 분류Korean
• klasifikacija, klasifikavimasLithuanian
• klasifikācijaLatvian
• pengelasanMalay
• indelingDutch
• klassifisering, inndeling i klasserNorwegian
• klasyfikacjaPolish
• طبقه بندیPersian
• ترتیبولPashto
• classificaçãoPortuguese
• clasificareRomanian
• классификацияRussian
• triedenieSlovak
• razvrstitevSlovenian
• klasifikacijaSerbian
• klassifikation, klassificeringSwedish
• การจัดกลุ่มThai
• sınıflandırmaTurkish
• 分類Chinese (Trad.)
• класифікація; визначення категорійUkrainian
• درجہ بندیUrdu
• sự phân loạiVietnamese
• 分类Chinese (Simp.)