noun ·Moderate ·College level

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

Synonyms

All synonyms

acosmismagnosticismanimalismanimatismanimismaristotelianism

Antonyms

All antonyms

holism

Etymology

From atom + -ism.

Related phrases

logical atomism

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.