buoy
noun
\ ˈbü-ē
, ˈbȯi
\
, ˈbȯi
\
Definition of buoy
(Entry 1 of 2)
1
: float sense 2
especially, nautical
: a floating object moored to the bottom to mark a channel or something (such as a shoal) lying under the water
swam out toward the buoy
2
: life buoy