Definition of summer-long in English:

summer-long

adjective

  • 1Of a day: long, as days are in the summer.

  • 2That lasts throughout, or is as long as, the whole summer.

adverb

poetic
  • For the duration of the summer; throughout the whole summer.

Origin

Old English; earliest use found in Metres of Boethius. From summer + long.

Pronunciation

summer-long

/ˌsʌməˈlɒŋ/