What is the meaning of רב?

Many, much.

Great.

Enough: more than is needed.

A rabbi.

Multi-, poly-, multiple-; many.

Much, many, great.

To multiply, to become many.

defective spelling of רוב

to fight

An archer: one who shoots arrows.

To shoot.

Mister (a title used with the first name of any male)

(nonstandard) Unpointed form of רבֿ (rov).

Source: wiktionary.org