General English

General Science

  • noun one of the categories into which organisms are divided


  • noun a type of common stock



  • A group of items ranked together on the basis of common characteristics or requirements.
  • A division grouping or distinction based on grade or quality.
  • The opening into which a door or window will be fitted.


  • A group or set sharing common characteristics.
  • In object oriented programming, a set of objects which share common characteristics. For instance, a class may be titled geometric shapes, and contain objects which are triangles, squares, pentagons, hexagons, and so on.
  • Classifications of amplifiers based on the relationship between the input signal and the output current For classification purposes, a simplified output stage consisting of two complementary tubes or transistors is assumed for most classes. Each class has its own linearity and efficiency characteristics. Examples include class A amplifiers, class AB amplifiers, class C amplifiers, and so on. Also called amplifier class.

Information & Library Science

  • noun a division of a classification scheme

Media Studies

  • noun a social classification loosely based on the comparative level of wealth and opportunity into which a person is born


  • noun a group of things or animals which are similar in some way
  • verb to put into groups of similar things


  • adjective excellent. Deriving from the colloquial ‘classy’ and top-class, class act, etc., this use of the word has been a vogue term among younger speakers since the mid-1990s – a successor to wicked and safe and a contemporary synonym of sound or the bollocks.


  • noun a category or group into which things are classified according to quality or price

Origin & History of “class”

Latin classis originally denoted ‘the people of Rome under arms, the ancient Roman army’; it appears to come from an earlier unrecorded *qladtis, a derivative of the base *qel- ‘call’, which points to an underlying sense ‘call to arms’. Under the terms of the constitution attributed to Servius Tullius, a 6th-century bc king of Rome, the army, and hence the people, was divided into six such classes, membership of each based originally on the amount of land held, and latterly on wealth in money terms. English first adopted the word in this antiquarian sense (which provided the basis for the modern application to social class), but its widespread use in the language probably began in the sense ‘group of pupils’. The derivatives classic (17th c.) and classical (16th c.) come from Latin classicus, probably via French classique; in Latin, the adjective signified ‘of the highest class of Roman citizen’, whence the word’s present-day approbatory connotations.