- Summer solstice is the longest day of the year, which in the Northern Hemisphere is around June 21st and in the Southern Hemisphere is around December 21st.
An example of summer solstice is the first day of summer.
summer solstice definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
summer solstice definition by American Heritage Dictionary
nounThe American Heritage® Dictionary of the English Language, 4th edition Copyright © 2010 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
In the Northern Hemisphere, the solstice that occurs on or about June 21.
summer solstice - Science Definition
See under solstice.