either of the two times in the year, the summer solstice and the winter solstice, when the sun reaches its highest or lowest point in the sky at noon, marked by the longest and shortest days
the solstice at midsummer, at the time of the longest day, about 21 June in the northern hemisphere and 22 December in the southern hemisphere
the solstice at midwinter, at the time of the shortest day, about 22 December in the northern hemisphere and 21 June in the southern hemisphere
either of the two times in the year, the summer solstice and the winter solstice, when the sun reaches its highest or lowest point in the sky at noon, marked by the longest and shortest days
either of the two times in the year, the summer solstice and the winter solstice, when the sun reaches its highest or lowest point in the sky at noon, marked by the longest and shortest days