The usually warmest season of the year, occurring between spring and autumn and constituting June, July, and August in the Northern Hemisphere, or, as calculated astronomically, extending from the summer solstice to the autumnal equinox.
A period of fruition, fulfillment, happiness, or beauty.
A year: a girl of 13 summers.
v.
sum·mered, sum·mer·ing, sum·mers
v.
tr. To lodge or keep during the summer: summered the herd in the south meadow. v.
intr. To pass the summer: They summered at a beach resort. adj.
Of, having to do with, occurring in, or appropriate to the season of summer: summer heat; summer attire.
Grown during the season of summer: summer crops.
[Middle English sumer, from Old English sumor; see sem-2 in Indo-European roots.] sum'mer·ly adv. & adj.
[suhm-er-lee] 
ər