open-water swim
nounUK /ˌəʊpən ˈwɔːtə swɪm/
US /ˌoʊpən ˈwɔːtər swɪm/
A swim you do in a lake, river, or sea, not in a pool.
She did her first open-water swim in the lake last summer.
RELATED WORDS
OTHER MEANINGS
2. A long-distance swimming race held in natural water.
He trained all year for the open-water swim at the coast.
3. Swimming for fun in natural water rather than a pool.
Open-water swim is a popular weekend activity here.
4. The swimming part of a triathlon done in a lake or sea.
The open-water swim comes first in the race.