# deterministic

/dɪˌtɝməˈnɪstɪk/ (US) · /dɪtˌɜːmɪnˈɪstɪk/ (UK) · CEFR C1 · Adjective

Source: https://englishreference.com/word/deterministic
Updated: 2026-05-18

## Definition

describing a system where the future is completely decided by the past. If you know all the starting conditions, you can predict exactly what will happen next.

For teachers: relating to a system in which the future state is entirely determined by the initial conditions and the laws of nature. Often used in contrast to probabilistic or stochastic systems.

## Examples

- The computer program is deterministic, so it always gives the same result.
- In a deterministic model, every input leads to exactly one output, making it easier to debug than a random process.
- The philosopher argued that a deterministic universe leaves no room for free will, as every human action is the inevitable result of prior physical states.

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