Relativism is a philosophical view that denies claims to objectivity within a particular domain and asserts that valuations in that domain are relative to a particular framework or standpoint. There are many different kinds of relativism, including moral relativism, cognitive relativism, and aesthetic relativism.

Moral relativism is the view that moral judgments, beliefs about right and wrong, good and bad, vary greatly across individuals, cultures, and historical periods. Cognitive relativism implies that all beliefs or belief systems are equally true. Aesthetic relativism asserts that judgments of beauty are relative to the individual or culture making the judgment.

Relativism has been both popular and reviled in philosophy. Defenders see it as a harbinger of tolerance and the only ethical and epistemic stance worthy of the open-minded and tolerant. Detractors dismiss it for its alleged incoherence and uncritical intellectual permissiveness.

The term "relativism" has been attached to a wide range of ideas and positions, which may explain the lack of consensus on how the term should be defined. The profusion of the use of the term “relativism” in contemporary philosophy means that there is no ready consensus on any one definition.