Upon Definition

ə-pŏn, ə-pôn

preposition

On.

The leaves are scattered upon the grass. He put the book upon the table. Upon hearing the news, we all cheered.

American Heritage

On (in various senses), or up and on.

Webster's New World

Being above and in contact with another.

Place the book upon the table.

Wiktionary

Being directly supported by another.

The crew set sail upon the sea.

She balanced upon one foot.

Wiktionary

At a prescribed point in time.

The contract was rendered void upon his death.

Wiktionary

Synonyms:

adverb

On.

A canvas not painted upon.

Webster's New World

On it; on one's person.

Webster's New World

Thereupon; thereafter.

Webster's New World

Being the target of an action.

He was set upon by the agitated dogs.

Wiktionary

Incidental to a specified point in time or order of action; usually combined with here-, there- or where-.

The clock struck noon, whereupon the students proceeded to lunch.

Wiktionary

Origin of Upon

From Middle English upon, uppon, uppen, from Old English upon, uppon, uppan (“on, upon, up to, against, after, in addition to"), equivalent to up (“adverb") +"Ž on (“preposition"). Cognate with Icelandic up á, upp á (“up on, upon"), Swedish pÃ¥ (“up on, upon").

From Wiktionary