Definitions of summer:

• noun:   the warmest season of the year; in the northern hemisphere it extends from the summer solstice to the autumnal equinox

  Example: "They spent a lazy summer at the shore"

• verb:   spend the summer

  Example: "We summered in Kashmir"

• name:  A female given name (rare: 1 in 5882 females; popularity rank in the U.S.: #662)
• name:  A surname (rare: 1 in 50000 families; popularity rank in the U.S.: #5643)