any of the four astrological signs, Gemini, Virgo, Sagittarius, or Pisces, that are grouped together because of their placement at the end of the seasons and characterized by the attribute of adaptability to circumstances. Cf. quadruplicity .
MUTABLE SIGN
Meaning of MUTABLE SIGN in English
Random House Webster's Unabridged English dictionary. Полный английский словарь Вебстер - Random House . 2012