class (nom)
Sens 1 : a collection or division of people or things sharing a common characteristic, attribute, quality, or property. [source : CED]
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Sens 2 : a group into which people or things are divided according to their quality or abilities. [source : LG]
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Sens 3 : one group of a usually society-wide grouping of people according to social status,
political or economic similarities, or interests or ways of life in common. [source : MWU]
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Sens 1 : to arrange things in groups according to features that they have in common. [source : OAAD]