simple past tense and past participle of top-drain

(transitive) To drain the surface of (a field, farm, etc.).

(idiomatic) wasted or irretrievable.

The migration of educated or talented people from less economically advanced areas to more economically advanced areas, especially to large cities or richer countries.

(vulgar, of men) To urinate.

A shallow trench, sometimes lined with tile or containing a perforated pipe, backfilled with gravel and then covered over, used to collect and channel runoff water.

Alternative form of drainplug

(US) An access point or conduit for rainwater that drains directly downstream in a (drainage) basin without going through sewers or water treatment in order to prevent or belay floods

A drain or vent for water, somewhat like a well or pit, serving to discharge the water of wet land. / A drain conducting to a well or pit.

(agriculture) A drain made by laying under earth the sprays or small branches of trees, which keep passages open.