simulation

noun

sim·​u·​la·​tion ˌsim-yə-ˈlā-shən 

1

: the act or process of simulating

2

: a sham object : counterfeit

3

a

: the imitative representation of the functioning of one system or process by means of the functioning of another

a computer simulation of an industrial process

b

: examination of a problem often not subject to direct experimentation by means of a simulating device

Examples of simulation in a Sentence

a computer simulation of spaceflight

a simulation of the planet's surface

They use computer simulation to predict weather conditions.

Recent Examples on the Web

In order to measure AI’s tendency to give responses aligning with trends rather than logic, researchers tested seven models, including GPT-5, Claude, Gemini, Grok, across 15,000 simulations and scenarios. —Sasha Rogelberg, Fortune, 10 Apr. 2026

The game, which allows for highly realistic simulations of manned (or Kerballed) missions to space (including lunar landings), has seen its second-highest number of concurrent Steam players ever, only beaten by its full launch way back in 2015. —Alan Bradley, Space.com, 9 Apr. 2026

This crash aftermath simulation, which includes a full emergency response, is designed to demonstrate the consequences of impaired and distracted driving. —Stephanie Stahl, CBS News, 8 Apr. 2026

At our newest campus in Haverhill, Massachusetts, for example students will train in a 25,000-square-foot facility equipped with interactive shifting simulation and a new curriculum that focuses on hands-on learning from day one. —Samantha Greenberg, Hartford Courant, 7 Apr. 2026

Word History

Etymology

Middle English simulacioun "insincerity, pretense, deceit," borrowed from Anglo-French simulacion, borrowed from Latin simulātiōn-, simulātiō "act of copying, putting on an appearance, pretense," from simulāre, similāre "to pretend, assume the appearance of by one's conduct, produce a fraudulent imitation of, imitate" + -tiōn-, -tiō, suffix of verbal action — more at simulate

First Known Use

14th century, in the meaning defined at sense 1

Rhymes for simulation

• abdication
• aberration
• abjuration
• abnegation
• abrogation
• acceptation
• acclamation
• acclimation
• accusation
• activation
• actuation
• acylation

Kids Definition

simulation

noun

sim·​u·​la·​tion ˌsim-yə-ˈlā-shən 

1

: the act or process of simulating

2

: an object that is not genuine

3

: the imitation by one system or process of the way in which another system or process works

a computer simulation of spaceflight

Legal Definition

simulation

noun

sim·​u·​la·​tion ˌsim-yə-ˈlā-shən 

1

in the civil law of Louisiana

2

: the act of simulating

3

: a contract that by mutual agreement does not express the true intent of the parties see also counterletter compare disguised donation at donation

Note: Although a simulation does not have effect as between the parties, its lack of effect may not be asserted against third parties, such as creditors or bona fide purchasers, to avoid liability.