What does simulate mean?

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From our dictionary:

sim•u•late

Pronunciation: (
v.sim'yu-lAt";
adj.sim'yu-lit, -lAt"),
[key]
v., -lat•ed, -lat•ing,
adj.


v.t.
1. to create a simulation, likeness, or model of (a situation, system, or the like): to simulate crisis conditions.
2. to make a pretense of; feign: to simulate knowledge.
3. to assume or have the appearance or characteristics of: He simulated the manners of the rich.

adj.
Archaic.simulated.