This is the 482nd most frequent Hindi word.
अरब
The Hindi word "अरब" means "Arab" (a region or people) or "a billion" (the number 1,000,000,000).
'अरब' here signifies the numerical value of a billion.
उसने अपनी कंपनी से एक अरब रुपये कमाए।
He earned one billion rupees from his company.
In this context, 'अरब' is used to indicate the time span of a billion years.
यह कहानी एक अरब वर्ष पहले के समय की है।
This story is from a billion years ago.
Here, 'अरब' is used to refer to the Arab regions or countries.