Real Dictionary

summer
variable noun: Summer is the season between spring and autumn when the weather is usually warm or hot.

summer in American English 1
the warmest season of the year: in the North Temperate Zone, generally regarded as including the months of June, July, and August: in the astronomical year, that period between the summer solstice and the autumnal equinox
adjective: of, pertaining to, or characteristic of summer
intransitive verb: to spend or pass the summer
noun: 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
transitive verb: to keep, feed, or manage during the summer

summer in American English 2
a large, horizontal, supporting beam or girder
noun: a principal beam or girder, as one running between girts to support joists

summer in British English 1
noun: the warmest season of the year, between spring and autumn, astronomically from the June solstice to the September equinox in the N hemisphere and at the opposite time of year in the S hemisphere

summer in British English 2
noun: a large horizontal beam or girder, esp one that supports floor joists