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ultra

USUL-truh/ˈʌltɹə/

Pluralultras

6 meanings of ultra

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  1. 1
    long racenouncountable
    A running race that is longer than a marathon.

    She trained for a year before her first ultra in the mountains.

    He has run three ultras, but he still finds short races hard.

    Note
  2. 2
    nouncountable
    A person with extreme political views, sometimes an armed fighter for such a cause.

    One ultra from the banned group gave himself up to the army after a week hiding in the forest.

    At the march, nationalist ultras shouted that people from other countries must leave.

    Similarextremist, radical, militant, fanatic

    Oppositemoderate

    Note
  3. 3
    soccer fannouncountable
    A very loyal soccer fan in an organized group that sings, waves banners, and lights flares at games.

    The ultras lit red flares and sang for the whole game.

    Her brother became an ultra and now goes to every away game with the club's loudest fans.

    UsagePeople usually say the ultras for the whole group of fans.

    Note
  4. 4
    wartime codenoununcountable
    The secret name British code breakers used in World War II for enemy messages they decoded.

    During the war, only a few officers were allowed to read Ultra.

    Ultra reports told the generals where enemy ships were heading.

    Note

Less common meanings

  1. 5
    adjectiverare
    Much more extreme than normal, with very strong beliefs and no wish to give in.
  2. 6
    noun
    A mountain whose top rises very far above the low ground that links it to higher mountains.

Practice

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Origin

From the Latin word ultrā.

Checked 1 Nov 2026 · 1 fact