13.1
In real, traceable use. Part of the curated seed collection; community review is coming.
Meaning · English
A half marathon
Register: slang
Where it’s used:
Used
American English
Examples
Holonym: 26.2
Usage example from English Wiktionary (CC BY-SA 4.0, retrieved 2026-07-30)
Sources & notes
Adapted from English Wiktionary (CC BY-SA 4.0, retrieved 2026-07-30 via kaikki.org).
Common questions
What does “13.1” mean?
A half marathon
Is “13.1” formal or informal?
13.1 is generally slang.