pisces Meaning, Definition & Usage

  1. noun the twelfth sign of the zodiac; the sun is in this sign from about February 19 to March 20
    Fish; Pisces the Fishes.
  2. noun (astrology) a person who is born while the sun is in Pisces
    Fish.
  3. noun a large faint zodiacal constellation; between Aquarius and Aries
  4. noun a group of vertebrates comprising both cartilaginous and bony fishes and sometimes including the jawless vertebrates; not used technically

WordNet

Pis"ces noun plural
Etymology
L. piscis a fish.
Definitions
  1. (Astron.) (a) The twelfth sign of the zodiac, marked &pisces; in almanacs. (b) A zodiacal constellation, including the first point of Aries, which is the vernal equinoctial point; the Fish.
  2. (Zoöl.) The class of Vertebrata that includes the fishes. The principal divisions are Elasmobranchii, Ganoidei, and Teleostei.

Webster 1913