adv. Out of which. [ R. ] [ 1913 Webster ]

The cleft whereout the lightning breaketh. Holland. [ 1913 Webster ]

adv. [ 1913 Webster ]

1. Of which; of whom; formerly, also, with which; -- used relatively. [ 1913 Webster ]

I do not find the certain numbers whereof their armies did consist. Sir J. Davies. [ 1913 Webster ]

Let it work like Borgias' wine,
Whereof his sire, the pope, was poisoned. Marlowe. [ 1913 Webster ]

Edward's seven sons, whereof thyself art one. Shak. [ 1913 Webster ]

2. Of what; -- used interrogatively. [ 1913 Webster ]

Whereof was the house built? Johnson. [ 1913 Webster ]