tournament UK /ˈtʊənəmənt/US /ˈtʊɹnəmənt/ noun3 •a competition made up of many matches, played to find out which team or player is the bestEngland secured their place at Euro 2012 with a scrambled draw in Montenegro - but Wayne Rooney was sent off and will miss the start of the tournament. — 2011 •(historical) During the Middle Ages, a series of battles and other contests designed to prepare knights for war. •A digraph obtained by assigning a direction to each edge in an undirected complete graph. formstournaments