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Webster 1913 Edition
Whereon
Where-on′
,adv.
1.
On which; – used relatively;
as, the earth
. whereon
we liveO fair foundation laid
whereon
to build. Milton.
2.
On what; – used interrogatively; as, whereon do we stand?
Webster 1828 Edition
Whereon
WHEREON
,adv.
1.
On which; as the ground whereon we tread.2.
On what. Whereon do we stand?