What does "determinacy" mean?

The ability to be completely determined in a definite way; the quality of being determinate.

How do you pronounce "determinacy"?

Pronounced //dɪˈtɜːmɪnəsi//.

Common synonyms include: assurance, determinateness, determinateness, inevitability, infallibility, necessity.

//dɪˈtɜːmɪnəsi// noun

noun ·Rare ·Advanced level

Noun

1
The ability to be completely determined in a definite way; the quality of being determinate. countable, uncountable
2
(game theory) The study of the circumstances under which a game has a winning strategy. countable, uncountable

From determinate + -cy.

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