Contraction can mean:

• Contraction (childbirth), a contraction during childbirth
• Contraction (grammar), a new word formed from two or more individual words, see also abbreviation and acronym
• Contraction (phonology)
• Contraction (economic), a reversal of economic growth; the opposite of economic expansion.
• The reverse of thermal expansion
• Contraction mapping, in mathematics, a type of function on a metric space
• Edge contraction or vertex contraction, graph operations used in graph theory
• Muscle contraction, one that occurs when a muscle fiber shortens
• Tensor contraction in tensor theory (in mathematics)
• Contraction, a stage in Wound healing

Contraction can also refer to:

• A structural rule in proof theory, see idempotency of entailment

Kontraktion | Contraction | Kontrakcja