noun ·pl the twelfth sign of the zodiac, marked / in almanacs.
2. pisces ·noun ·pl a zodiacal constellation, including the first point of aries, which is the vernal equinoctial point; the fish.
3. pisces ·noun ·pl the class of vertebrata that includes the fishes. the principal divisions are elasmobranchii, ganoidei, and teleostei.