רְבָבָה (rĕbābâ) is
a Hebrew noun
meaning multitude. It appears
18 times
in 10 books of the Hebrew Bible
(Strong's H7233).
Also rendered
myriad
Same Hebrew root (TWOT 2099d)
Range of meaning (TWOT 2099d)multitude, myriad, ten thousand; abundance; many, million
Full entry: Brown-Driver-Briggs and Strong's
רְבָבָהnoun, feminine: multitude, myriad, ten thousand
Strong's H7233רְבָבָה: abundance (in number), i.e. (specifically) a myriad (whether definite or indefinite) KJV:many, million, × multiply, ten thousand.
Meanings: Brown-Driver-Briggs (1906) and Strong's Hebrew Dictionary (1890), public domain, via the Open Scriptures Hebrew Bible Project (CC BY 4.0). TWOT numbers for reference only.
Root family 2099: רָבַבrābab — be, become, many, much; cast together, increase, multiply by the myriad; be manifold, be more, multiply, ten thousands