Meaning of "the definition is relative"

[Swatcat]

What does one exactly mean when they say : the definition is relative"?

[Mister Micawber]

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It means that it is not absolute, I suppose-- it is affected by circumstances.
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Native English teacher at Mister Micawber's

[Anna.ha]

I would say it would have the meaning that the definition is not something quantative that you can base on to measure other things or it's hard to point out exactly something is this one, not that one...etc

By saying this way the definition just gives people a perception of something :-