ultra /ˈʌltɹə/noun 8adjective 1forms 3 noun8 •An especially devoted football fan, typically organized and participating in choreographies (including pyrotechnics), often of outwardly intimidating demeanour, but distinguished from a violent hooligan (although overlap between both subcultures is possible)If a member of an official football club can be said to be a citizen of the football world, an ultra has to be considered as a militant. — 2013 •A political extremist.Five militants were nabbed while four ultras of Harkat-ul-Jehad-e-Islami (HuJI) gave themselves up. — 2005 •An ultraleftist. •An ultranationalist. •(historical) An ultraroyalist.Her soirées were among the most agreeable at Paris—she united all the rank and talent to be found in the ultra party, for she professed to be quite a female Maecenas; […] — 1828 •An ultramarathon. •Code name used by British codebreakers during World War 2 for decrypted information gained from the enemy. •An ultra-prominent peak. adjective1 •Extreme; far beyond the norm; fanatical; uncompromising.an ultra reformer; ultra measures formsultras · more ultra · most ultra