(lambda) Abstraction, (λname.expression)

Abstraction (computer science), a mechanism and practice to reduce and factor out details so that one can focus on few concepts at a time

Abstraction, the thought process wherein ideas are distanced from objects

Abstraction (sociology), the varying levels at which theoretical concepts can be understood

Abstraction (mathematics), the process of extracting the underlying essence of a mathematical concept, removing any dependence on real world objects

Water abstraction, the extraction of water from a waterbody.