What does the word, "Domain" mean?

In Blender? I never understood it :frowning:

well on m,eaning is
usually refer to Fluid sim or Smoke sim
you add a cube which you call Domain

and this is used as the 3D physical limits for the simulation
anything outside this cube volume is not taken into consideration for the fluid sim !

but there might be other meaning also!

salutations

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