Atomism

noun

Definitions

Noun
  1. 1
    The ancient Greek theory that all matter is composed of very small indestructible and indivisible particles. countable, uncountable
  2. 2
    (chemistry) any theory in which all matter is composed of tiny discrete finite indivisible indestructible particles wordnet
  3. 3
    The doctrine that society arises from individuals and that larger structures are unimportant. countable, uncountable
  4. 4
    (psychology) a theory that reduces all mental phenomena to simple elements (sensations and feelings) that form complex ideas by association wordnet

Etymology

From atom + -ism.

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