What does simulate mean?
Simulate means to imitate, represent, or reproduce something. The word is especially common in technical contexts, where a computer model, training exercise, or experiment may simulate a real system or environment: for example, a flight simulator reproduces the conditions of flying without requiring an actual aircraft. In everyday use, simulate can also mean to imitate another person's behavior or manner, often with the implication that the imitation is incomplete or insincere. A further, less frequent sense is to pretend to feel or experience something, as when someone simulates interest. The related noun simulation refers both to the process of simulating and to the model or representation produced by it, while a simulator is a device or program used for this purpose. Overall, simulate emphasizes reproduction, modeling, or controlled imitation rather than genuine participation in the activity being represented.
To imitate the behavior, appearance, or operation of someone or something; to represent conditions or processes for study, testing, or practice.
"The laboratory is simulating atmospheric conditions on Mars."
The technical sense is especially common in science, engineering, computing, and training contexts.
To pretend to experience or feel something, especially in order to deceive others.
"He simulated surprise when the unexpected guest arrived."
This sense often implies that the displayed feeling or reaction is not genuine.
Simulation lets us rehearse impossible scenarios safely before reality demands the real thing.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does simulate come from?
Simulate derives from the Latin verb simulare, meaning “to imitate” or “to represent as similar,” which is connected with Latin similis, “like” or “similar.” English borrowed the word in the early 17th century in the sense of pretension or imitation. Its later scientific meaning developed with the use of mathematical and mechanical models to represent real processes.
Related word forms
How simulate is actually used
In technical and academic contexts, simulate usually means to model or reproduce conditions for analysis, testing, training, or planning. The sense meaning to pretend is less common and can sound slightly formal or deceptive.
Easily confused with simulate
To simulate something is to imitate or reproduce it, whereas to stimulate something is to encourage increased activity or response.