Definition of "simulator" [sim•u•la•tor]

• One that simulates, especially an apparatus that generates test conditions approximating actual or operational conditions. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "The proposed simulator is unique because it could let researchers control how individual particles move and interact with each other."
• "New simulator is next step on the road to developing quantum computers"
• "Since this simulator is so intricate and complex, and since the asking price seems fairly high, I have created a website that describes, in great detail, every aspect of every item included in the auction."