concepts

/K AA1 N S EH0 P T S/
noun
  1. 1

    An abstract and general idea; an abstraction.

  2. 2

    Understanding retained in the mind, from experience, reasoning and imagination; a generalization (generic, basic form), or abstraction (mental impression), of a particular set of instances or occurrences (specific, though different, recorded manifestations of the concept).

  3. 3

    In generic programming, a description of supported operations on a type, including their syntax and semantics.

Source: https://en.wiktionary.org/wiki/concept, https://en.wiktionary.org/wiki/concepts