Definition of summer cloud in English:

summer cloud

noun

  • A cloud such as is seen on a summer day, especially one that is fleeting or does not spoil the fine weather.

Origin

Early 17th century; earliest use found in John Brinsley (bap. 1566, d. c1624), schoolmaster and writer on education. From summer + cloud.

Pronunciation

summer cloud

/ˌsʌmə ˈklaʊd/