Relating to the ordinal number following nine hundred ninety-nine million, nine hundred ninety-nine thousand, nine hundred ninety-nine.
नौ सौ निन्यानवे मिलियन, नौ सौ निन्यानवे हजार, नौ सौ निन्यानवे के बाद वाला क्रमांक।
English Usage: The company celebrates its billionth year of operation next month.
Hindi Usage: कंपनी अगले महीने अपनी अरबवां वर्षगांठ मनाएगी।
arabwaan, arabvaan, arabvan