(From the Merriam-Webster Online Dictionary)
verb
1 : to come or go down quickly from a high place or position
An apple fell from the tree.
A vase fell off the shelf.
2 : to come or go down suddenly from a standing position
She slipped and fell on the ice.
He fell flat on his face.
3 : to let yourself come or go down to a lower position
He fell [=dropped, sank] to his knees and asked for forgiveness.
He fell back/forward onto the bed.
To descend under force as to a lower place,
or through loss or lack.
To move to a lower degree, quality, state,
and become less thereby, to run off the track.
To drop without restraint.
To leave a standing or erect position, voluntarily or not.
To subside, to hand down, extending.
To become lowered unchastely, to lose innocence, to rot.
To succumb, to succumb, to succumb.
Off, to withdraw, diminish, deviate in heading.
If under, to be included, the concern of someone.
Upon, to encounter, to experience, to come by
as if by dropping.
To fell, to lag, to fail to say, to fail to pay.
To lose animation as of face, to collapse.
To come to pass at a certain time.
To issue forth, to receive by lot or chance,
into particular circumstance.
To be the obligation of.
To take one’s place.
To pass into other condition.
To rely upon, have recourse to, as its proper place, or by right.
To be given.
To envelope as if by sinking or to come upon,
passing into wakefulness, or into sleep with the night.
Movement in condition and growth from lively effort into dormancy,
rest and waiting;
A plummet;
Delving without volition ever downward, by rapid descent,
as though into ancient mine or water-worn cavern;
To vanish from the field of conflict;
To be thought of as formerly present, brought to mind only in retrospect;
To cease to be in any form familiar to the known–
thereby transformed from what was
into what-is-to-become and what-is-remembered;
To move inexorably past the boundary between control and control’s loss;
Entering into sleep, dropping into dream.
To come to pass, occur, become at a time, certain.
Autumn,
after which the winter, bleakest before the melt.
A cataract.
This One & This One 