At or in the time of; during; as, on Sunday we abstain from
labor. See At (synonym).

At the time of, conveying some notion of cause or motive;
as, on public occasions, the officers appear in full dress or uniform.
Hence, in consequence of, or following; as, on the ratification of the
treaty, the armies were disbanded.

Denoting performance or action by contact with the surface,
upper part, or outside of anything; hence, by means of; with; as, to
play on a violin or piano. Hence, figuratively, to work on one’s
feelings; to make an impression on the mind.

Indicating dependence or reliance; with confidence in; as,
to depend on a person for assistance; to rely on; hence, indicating the
ground or support of anything; as, he will promise on certain
conditions; to bet on a horse.

At or near; adjacent to; – indicating situation, place, or
position; as, on the one hand, on the other hand; the fleet is on the
American coast.

To or against the surface of; – used to indicate the motion
of a thing as coming or falling to the surface of another; as, rain
falls on the earth.

The general signification of on is situation, motion, or
condition with respect to contact or support beneath

e. üzerinde, üstünde. There was a lamp on the table. (Masanın üstünde bir lamba vardı.)

At, or in contact with, the surface or upper part of a
thing, and supported by it; placed or lying in contact with the
surface; as, the book lies on the table, which stands on the floor of a
house on an island.

In addition to; besides; – indicating multiplication or
succession in a series; as, heaps on heaps; mischief on mischief; loss
on loss; thought on thought.