An ultraroyalist in France.
"The group's most vocal member, an ultraroyalist named Henri, marched through Paris demanding the return of the monarchy to its former glory."
"The ultra ran past the finish line in record time."
Extreme; far beyond the norm; fanatical; uncompromising.
"The ultra-purist refused to even touch a single drop of sugar in his tea, no matter how tempting it seemed."
In plain English: Ultra means extremely intense or going to the absolute limit.
"The ultra-marathon runner finished the race in record time."
Usage: Use ultra to describe something that goes significantly beyond standard limits or norms, such as an ultra-marathoner running extreme distances. It often functions similarly to super- but carries a stronger connotation of intensity or fanaticism in contexts like ultra-conservative views.
The word comes from the Latin ultra, which originally meant "on the other side of." It traveled into English to retain its sense of meaning beyond a certain limit or extreme degree.