When you simulate something you imitate it. Hollywood makeup artists can use pencils and gray wigs to simulate old age in a young actor. It can also mean to model––a computer can simulate disaster scenarios in cities.

If you really admire someone's calm-under-pressure attitude, you may try to simulate their demeanor. When opening a present, it's polite to simulate surprise and excitement about the gift item, even if you already have it or it is ugly as dirt. Don't try to simulate your parents' signatures on excuse cards, though––signatures are unique to individuals––impossible to simulate perfectly.

Definitions of simulate

v reproduce someone's behavior or looks

copy, imitate
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conform to, follow
behave in accordance or in agreement with
imitate with mockery and derision
take off
mimic or imitate in an amusing or satirical manner
mime, mimic
imitate (a person or manner), especially for satirical effect
model, pattern
plan or create according to a model or models
follow, take after
imitate in behavior; take as a model
strive to equal or match, especially by imitating
go by
be or act in accordance with
ape, caricature
represent in or produce a caricature of
represent another person with comic intentions
burlesque, parody, spoof
make a parody of
pattern, make, regulate, set, measure, or estimate according to some rate or standard
sovietise, sovietize
model a country's social, political, and economic structure on the Soviet Union
Type of:
make a copy or equivalent of

v create a representation or model of

“The pilots are trained in conditions simulating high-altitude flights”
Type of:
create anew

v make a pretence of

assume, feign, sham
pretend to be somebody in the framework of a game or playful activity
deceive by a mock action
Type of:
act, dissemble, pretend
behave unnaturally or affectedly

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