Definition of summer noun from the Oxford Advanced American Dictionary

Oxford3000

summer

noun
/ˈsʌmər/
 
 
[uncountable, countable] the warmest season of the year, coming between spring and fallWe're going away in the summer.It's very hot here in summer.in the summer of 2011late/early summerthis/next/last summera cool/hot/wet summerIt is now high summer (= the hottest part of summer).a summer's daya summer dressthe summer vacationtwo summers ago see also Indian summer