Welcome to the forum, Elizaveta.
Have you found a context in which 'key' might mean 'button'? I can't think of one.
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Student or Learner
Hello! I have the question.
Does the word "key" have the meaning of button?
"Push the escape button" is not unheard of.
Just the other day I complimented a young student of my former piano teacher by saying "Lots of people can push the buttons at the right time. Not very many can make it music."
However, I was speaking metaphorically. Piano keys are not normally called buttons.
I am not a teacher.