noun ·Rare ·Advanced level

Definitions

Noun

1. 1
   A philosophy that attempts to define all scientific concepts in terms of specified operations or procedures of observation and measurement. countable, uncountable
2. 2
   (philosophy) the doctrine that the meaning of a proposition consists of the operations involved in proving or applying it wordnet

Etymology

From operational + -ism.

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