2 definitions found From WordNet (r) 2.0 [wn]: whereof adverb 1: of which; "punishment for a crime whereof he was convicted" 2: of what; "he knows whereof he speaks" From The Collaborative International Dictionary of English v.0.44 [gcide]: Whereof \Where*of"\, adverb 1. Of which; of whom; formerly, also, with which; -- used relatively. I do not find the certain numbers whereof their armies did consist. --Sir J. Davies. Let it work like Borgias' wine, Whereof his sire, the pope, was poisoned. --Marlowe. Edward's seven sons, whereof thyself art one. --Shak. 2. Of what; -- used interrogatively. Whereof was the house built? --Johnson.

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