Natural Law(redirected from Lex naturalis)
Also found in: Dictionary, Thesaurus, Legal, Encyclopedia.
In philosophy, the idea that that right and wrong are fixed, immutable things that human reason can discern. Some natural law theorists base natural law on their ideas about God, but one does not need to believe in God in order to believe in natural law. It forms the philosophical basis for what are now called human rights and for that reason is an important contributor to modern liberalism.