Strong's H7233 · Hebrew

rbabah

reb-aw-baw'

from 7231; abundance (in number), i.e. (specifically) a myriad (whether definite or indefinite)

Scholarly Lexicons

Brown-Driver-Briggs (BDB)

 H7233 רְבָבָה multitude , myriad , ten thousand  

Brown-Driver-Briggs Hebrew Lexicon (BDB), 1906 — public domain