transitive verb
2 a
: to draw off (liquid) gradually or completely - drained all the water out of the pool
b
: to cause the gradual disappearance of - drain the region's wealth
c
: to exhaust (see 1exhaust 1b) physically or emotionally - feeling drained at the end of a long workday
3 a
: to make gradually dry
b
: to carry away the surface water of - the river that drains the valley
c
: to deplete or empty by or as if by drawing off by degrees or in increments - drained the country of its resources
d
: to empty by drinking the contents of
intransitive verb
1 a
: to flow off gradually
b
: to disappear gradually : dwindle - his nervousness drained away, as it always did
- —H. A. Sinclair
2
: to become emptied or freed of liquid by its flowing or dropping - waiting for the tub to drain
3
: to discharge surface or surplus water - drains into the Gulf of Mexico