summer school

noun

1. study programs offered by a school, college, or university during the summer to those who wish to obtain their degrees more quickly, who must make up credits, or who wish to supplement their education.

2. a school offering such programs.

summer school

noun

1. a school, academic course, etc, held during the summer

Word History and Origins

Origin of summer school¹

An Americanism dating back to 1870–75