Correspondence theory
Truth or the falsity of a representation is determined in principle solely by how it relates to objective reality, by whether it accurately describes that reality.
(Socrates, Plato, and Aristotle)
Coherence theory
Truth is primarily a property of whole systems of propositions, and can be ascribed to individual propositions only according to their coherence with the whole.
Constructivist theory
Truth is constructed by social processes, is historically and culturally specific, and that it is in part shaped through the power struggles within a community.
Consensus theory
Truth is whatever is agreed upon.
(Jürgen Habermas)
Pragmatic theory
Truth is verified and confirmed by the results of putting one's concepts into practice.
(Charles Peirce, William James, and John Dewey)
Minimalist (deflationary) theory
The label truth is a tool of discourse used to express agreement, to emphasize claims, or to form certain types of generalizations.
Performative theory
To say a statement is true is not to make a statement about a statement, but rather to perform the act of agreeing with, accepting, or endorsing a statement.
(P. F. Strawson)
Redundancy theory
Asserting that a statement is true is completely equivalent to asserting the statement itself.
source: http://en.wikipedia.org/wiki/Truth
