# Monte Carlo

CEFR C1 · Noun

Source: https://englishreference.com/word/monte-carlo
Updated: 2026-09-28

## Definition

a computer method that solves complex problems by running thousands of random simulations to see all the possible outcomes.

For teachers: a broad class of computational algorithms that rely on repeated random sampling to obtain numerical results for problems that are intractable via closed-form analysis.

## Examples

- The team used a Monte Carlo simulation to estimate the probability of rain during the championship game.
- In finance, risk analysts run Monte Carlo simulations across market variables to stress-test investment portfolios under uncertain economic conditions.
- Monte Carlo tree search balances exploration and exploitation by recursively sampling simulated game rollouts to guide decision-making in high-dimensional state spaces.

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