Main Entry: pro·long

Pronunciation: \prə-ˈlȯŋ\

Function: transitive verb

Etymology: Middle English, from Middle French prolonguer, from Late Latin prolongare, from Latin pro- forward + longus long

Date: 15th century

1 : to lengthen in time : continue
2 : to lengthen in extent, scope, or range

synonyms see extend

— pro·lon·ga·tion \(ˌ)prō-ˌlȯŋ-ˈgā-shən, prə-\ noun

— pro·long·er \prə-ˈlȯŋ-ər\ noun