the ordinal number after seventh

आठवां

English Usage: The eighth chapter of the book is very interesting.

Hindi Usage: पुस्तक का आठवां चैप्टर बहुत दिलचस्प है।

being number eight in a sequence

क्रम में आठवां होना

English Usage: She finished in eighth place in the race.

Hindi Usage: वह दौड़ में आठवें स्थान पर समाप्त हुई।

in the eighth position

आठवें स्थान पर

English Usage: He arrived at the eighth hour.

Hindi Usage: वह आठवें घंटे में आया।