Definition of both :
1. As well; not only; equally.
2. The one and the other; the two; the pair, without exception of either.
one as well as the other,
the one and the other
(part of speech: adjective)
" You are both
all right. - "Jewel's Story Book",
Clara Louise Burnham.
Look- there is enough for us both."
- "The Complete Historical Romances of Georg Ebers",
" Yes, we can both
do that. - "John March, Southerner",
George W. Cable.