What is the meaning of Rah?

An exclamation of support or encouragement.

An exclamation of patriotic or passionate excitement.

A person (especially a student) with a posh accent who looks down on those who are "common".

Posh.

An expression of surprise.

An expression of admiration.

An expression of frustration or anger.

Romanization of ꦫꦃ

fruit, berry

acorn, nut

to bear fruit

Alternative spelling of rāh

Romanization of 𒈛 (raḫ)

frog

Source: wiktionary.org