The Collaborative International Dictionary
Determinacy \De*ter"mi*na*cy\, n. Determinateness. [R.]
Wiktionary
n. 1 The ability to be completely determined in a definite way; the quality of being determinate. 2 (context mathematics English) ''(game theory)'' The study of the circumstances under which a game has a winning strategy.
Wikipedia
In set theory, a branch of mathematics, determinacy is the study of under what circumstances one or the other player of a game must have a winning strategy, and the consequences of the existence of such strategies.
Usage examples of "determinacy".
Looking back, the chain of events leading to her death seemed inevitable, bound with an iron determinacy because there was nothing he could ever do, even in an infinity of time, to change them.
And if He were, would I understand his explanation of death and immortality, of determinism and indeterminism, of determinacy and indeterminacy?
Sharing a real-time link via our Quantum Determinacy Communications suites, I watch, I feel as he maneuvers himself into a kilometer-wide pool of boiling water, the source of the hot-water Dukhan River and the "smoke" of "Smoke Valley.