PiscesPronunciation: /ˈpʌɪsiːz, ˈpɪskiːz/Translate Pisces | into French | into German | into Italian | into Spanish Definition of Pisces 1 Astronomy a large constellation (the Fish or Fishes), said to represent a pair of fish tied together by their tails. 2 Astrology the twelfth sign of the zodiac, which the sun enters about 20 February. (a Pisces) (plural same) a person born when the sun is in the sign of Pisces. Derivatives PisceanPronunciation: /ˈpʌɪsɪən/ noun & adjective sense 2.Origin:Latin, plural of piscis 'fish'Pisces in other Oxford dictionaries Definition of Pisces in the US English dictionary