@Philosopher19,
I have already provided the standard reference: Wittgenstein 'meaning is use'.
In addition Rorty et el argue that all words (including 'existence') have no fixed meaning. Words do not
represent reality they
construct it by negotiated wgreement and they have no permanent basis independent of a shifting communicative contexts with respect to human projects.
As far as 'existence ' itself is concerned, at least one philosopher, Heidegger, argued that it
Existenz was only applicable to a mode of being
Sein experienced by humans with respect to time
Zeit in which 'things' were merely 'affordances for potential interaction'. This view of 'things' he called 'considering'. And beyond philosophy, it is now a major view of physicists that there are no 'things'
per se, rather there are 'interaction events' some of which are deemed to persist or repeat with respect to human observers, but not in 'time',but relative to increasing entropy.