The term SIGN OF WINTER can be represented by four different crossword solutions: FROST (5 letters), PISCES (6 letters), SNOWFLAKE (9 letters), and AQUARIUS (8 letters). FROST is a type of weather phenomenon that occurs when the temperature drops below freezing, resulting in the formation of ice crystals on surfaces. PISCES is one of the twelve astrological signs of the zodiac, which is associated with winter due to its position in the calendar. SNOWFLAKE is a type of frozen precipitation that falls from the sky during winter. AQUARIUS is another astrological sign of the zodiac, which is also associated with winter. COLDSNAP is a term used to describe an unusually cold period of weather during winter.