First-class cricket (which for this purpose includes all "important matches" played before 1895), along with historical single-wicket and the modern limited-overs forms of List A and Twenty20, is one of the highest-standard forms of cricket. The origin of the term "first-class cricket" is unknown but it was used loosely before it acquired an official status, effective in 1895, following a meeting of leading English clubs in May 1894. Subsequently, at a meeting of the Imperial Cricket Conference (ICC) in May 1947, it was formally defined on a global basis.