The Collaborative International Dictionary of English v.0.48:
Schoolhouse \School"house`\, n. A house appropriated for the use of a school or schools, or for instruction. [1913 Webster]WordNet (r) 3.0 (2006):
schoolhouse n 1: a building where young people receive education; "the school was built in 1932"; "he walked to school every morning" [syn: school, schoolhouse]