ultramarathon

noun ul·tra·mar·a·thon \ ˌəl-trə-ˈmer-ə-ˌthän , -ˈma-rə- \
|Updated on: 19 Jun 2018

Definition of ultramarathon

: a footrace longer than a marathon

ultramarathoner

play \ˌəl-trə-ˈmer-ə-ˌthä-nər, -ˈma-rə-\ noun

Recent Examples of ultramarathon from the Web

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'ultramarathon.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of ultramarathon

1977

in the meaning defined above

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