the deep end

: extending far from some surface or area: such as

: extending far downward

: extending well inward from an outer surface

: to a great depth : deeply

: far on : late

: near the outer limits of the playing area

: a vast or immeasurable extent : abyss

: the extent of surrounding space or time

: ocean

: the part of an area that lies at the boundary

: a point that marks the extent of something

: the point where something ceases to exist

: to bring to an end

: destroy

: to make up the end of

: final, ultimate

: to put (grain or hay) into a barn or stack

: within : inside — compare ect-, exo-

: taking in