1. the theory that all matter is composed of tiny indivisible particles called atoms
Usage: philosophy; physics
2. a philosophical doctrine that explains phenomena in terms of simple, irreducible components
Usage: philosophy

Examples

• Ancient Greek philosophers like Democritus developed early forms of atomism.
• Modern atomism forms the foundation of chemistry and physics.
• The scientist’s atomism led her to break down complex problems into simpler parts.
• Atomism suggests that understanding individual components helps explain the whole.
• The debate between atomism and holism continues in philosophy of science.
• Dalton’s atomic theory represented a major advancement in scientific atomism.