🕒

upon

preposition

/əˈpɒn/

Meaning

on or immediately after

Upon hearing the news, he rushed to the hospital.

on, following

before

upon arrival, upon hearing, upon request

next to or at the side of someone or something

At a lower level or position than something else.

through, by way of, or using a particular route or means

in or to a lower position than something

in the absence of, or not having something

used to indicate purpose, destination, or recipient