• Of or relating to fluid.
  • In a state of flux; subject to change.
  • Moving smoothly, or giving the impression of a liquid in motion.
  • Convertible into cash.
  • Genderfluid.


  • From Middle English fluid, from Latin fluidus, from Latin fluō, from Proto-Indo-European *bʰleh₁-. Akin to Ancient Greek φλύειν. Not related to English flow, which is a native, inherited word from *plew-.

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