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Webster 1913 Edition

Noun.

[Cf. F.

vacuiste

One who holds the doctrine that the space between the bodies of the universe, or the molecules and atoms of matter, is a vacuum; – opposed to

plenist

Noun.

[from vacuum.] One who holds to the doctrine of a vacuum in nature; opposed to a plenist.

vacuist ‎(plural vacuists)

(philosophy) One who holds the doctrine that the space between the bodies of the universe, or the molecules and atoms of matter, is a vacuum.

One who holds the doctrine that the space between the bodies of the universe, or the molecules and atoms of matter, is a vacuum