the day of the year when the Sun is above the horizon for the longest amount of time, around 21st June in the northern half of the Earth and 21st December in the southern half
Synonyms and related words
The seasons and times of the year
autumn
autumnal
British Summer Time
summer solstice
noun countable/uncountable
US
Word Forms
singular
summer solstice
plural
summer solstices
DEFINITIONS1
1
the day of the year when the Sun is above the horizon for the longest amount of time, around June 21st in the northern half of the Earth and December 21st in the southern half