D defs.my
Entry 1 sense Webster, 1913

Simulation

/sĭmˌ-yəl-āsh'-ən/ · Sim·u·la·tion · IPA /ˌsɪm.jəˈleɪ.ʃn̩/
01 n. The act of simulating, or assuming an appearance which is feigned, or not true; -- distinguished from dissimulation, which disguises or con…
  1. 1.
    The act of simulating, or assuming an appearance which is feigned, or not true; -- distinguished from dissimulation, which disguises or conceals what is true.