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Webster's Dictionary (1865)

Sub-měr′/sion, n.

noun

[Lat. submersio, Fr. submersion, It. sommersione.]

  1. The act of submerging, or putting under water or other fluid, or of causing to be overflowed; the act of plunging under water, or of drowning.
  2. The state of being put under water or other fluid, or of being overflowed or drowned.