1 the act or an instance of simulating
2 the assumption of a false appearance or form
3 a representation of a problem, situation, etc., in mathematical terms, esp. using a computer
4 (Maths, statistics, computing) the construction of a mathematical model for some process, situation, etc., in order to estimate its characteristics or solve problems about it probabilistically in terms of the model
5 (Psychiatry) the conscious process of feigning illness in order to gain some particular end; malingering
English Collins Dictionary - English Definition & Thesaurus
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"Collins English Dictionary 5th Edition first published in 2000 © HarperCollins Publishers 1979, 1986, 1991, 1994, 1998, 2000 and Collins A-Z Thesaurus 1st edition first published in 1995 © HarperCollins Publishers 1995"