What does antinomy mean?
Antinomy refers to a genuine contradiction between two positions, principles, or lines of reasoning, each of which appears individually valid or well supported. Unlike an ordinary dispute, an antinomy cannot be resolved simply by showing that one side has made an error, because both sides seem to follow sound logic. The term is most closely associated with the German philosopher Immanuel Kant, who used it in his Critique of Pure Reason (1781) to describe four pairs of conflicting conclusions — about whether the world has a beginning, whether matter is infinitely divisible, whether freedom exists, and whether a necessary being exists — which he took as proof that human reason overreaches when it strays beyond experience. Today the word appears mainly in philosophy, theology, and legal scholarship. Its Greek-derived name literally means 'against law', capturing the striking idea that two lawful chains of reasoning can collide head-on.
nounA contradiction between two beliefs, conclusions, or principles that are each individually reasonable or well-founded; in Kantian philosophy, a conflict of reason with itself arising when it seeks to answer questions beyond the limits of experience.
- A contradiction between two conclusions or principles that are each reached by apparently sound reasoning.
- (In Kant's philosophy) one of the four conflicts of transcendental reason concerning cosmological questions such as the finitude of the universe and the existence of freedom.
"Kant argued that reason inevitably falls into antinomy when it attempts to prove whether the universe had a beginning in time."
"The debate exposed a genuine antinomy: both the right to free expression and the duty to prevent harm seemed equally compelling yet mutually exclusive."
"In the Critique of Pure Reason, Kant presents the antinomy of freedom versus determinism as evidence that metaphysics exceeds the bounds of possible experience."
The standard plural follows the regular -y → -ies pattern. It is frequently used when discussing multiple instances, particularly Kant's four antinomies.
"Kant identified four antinomies of pure reason, each pairing a thesis and an antithesis about the ultimate structure of reality."
The word 'antinomy' literally means 'against law' — a clash not of opinions, but of two arguments that both obey the rules of logic perfectly and still contradict each other.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does antinomy come from?
Antinomy derives from the Greek antinomia, formed from anti- ('against') and nomos ('law'), meaning a contradiction of laws or against law. The term entered Western learned usage through Latin translations of Greek philosophical texts and became established in European philosophy in the early modern period, most famously through Kant's use of 'die Antinomien' in the Critique of Pure Reason. It shares its Greek roots with related terms built on nomos, such as autonomy ('self-law') and economy (originally household law or management).
Related word forms
How antinomy is actually used
Antinomy is a formal, scholarly term used chiefly in philosophy, theology, and legal theory; it rarely appears in casual conversation. It carries an intellectual connotation, signalling that the conflict at issue is deep and structural rather than a mere disagreement. The plural 'antinomies' is common when referring collectively to Kant's four antinomies.
Easily confused with antinomy
An antonym is a word opposite in meaning to another word (hot/cold), whereas an antinomy is a contradiction between two rationally defensible propositions.
A paradox is any seemingly self-contradictory statement that may reveal a hidden truth, while an antinomy specifically denotes a conflict between two conclusions each supported by valid reasoning.