Summer (noun)

1. The season between spring and fall, in the Northern Hemisphere typically extending from the summer solstice to the autumnal equinox.
2. The warmest season of the year, in which the sun is highest in the sky.
3. The period of finest development, perfection, or beauty.

Origin:

Old english sumor; akin to old high german sumar summer, latin summus highest, best, greek hymēs.

Examples:

1. Summer is my favorite season.
2. We usually go on vacation during the summer.
3. The summer heat was unbearable.
4. We spent the summer at the beach.
5. The summer fruits are ripe now.