home s Amalia Ulman summer sum⋅mer [suhm-er] –noun 1. the season between spring and autumn, in the Northern Hemisphere from the summer solstice to the autumnal equinox, and in the Southern Hemisphere from the winter solstice to the vernal equinox. 2. the period comprising the months of June, July, and August in the U.S., and from the middle of May to the middle of August in Great Britain. 3. a period of hot, usually sunny weather: We had no real summer last year. 4. the hotter half of the year (opposed to winter ): They spend the summers in New Hampshire and the winters in Florida. a b c d e f g h i j k l m n o p q r s t u v w x y z sulk sun sunbathe summer sunlight sunrise supermarket surrender support swan symmetry sunset synchronicity