Philos. a theory that the universe is made up of tiny, simple, indivisible particles that cannot be destroyed
Origin of atomismatom + ism
- The ancient theory of Democritus, Epicurus, and Lucretius, according to which simple, minute, indivisible, and indestructible particles are the basic components of the entire universe.
- A theory according to which social institutions, values, and processes arise solely from the acts and interests of individuals, who thus constitute the only true subject of analysis.
(countable and uncountable, plural atomisms)