/ˈʌltɹə/
noun
An ultraroyalist in France.An extremist, especially an ultranationalist.An especially devoted football fan, typically associated with the intimidating use of extremist slogans, pyrotechnics and sometimes hooligan violence.An ultramarathon.An ultra-prominent peak.(usually capitalised) Code name used by British codebreakers during World War 2 for decrypted information gained from the enemy.adjective
Extreme; far beyond the norm; fanatical; uncompromising.