conj

• (formal) Of what.
• (formal) Of which.
  "SATURNINUS: Go fetch them hither to us presently. TITUS: Why, there they are, both baked in that pie, Whereof their mother daintily hath fed, Eating the flesh that she herself hath bred."
• (formal) Of whom.
  "Now one day of the days, […] the Sultan cast his eyes upon her as she stood before him, and said to his Grand Wazir, “This be the very woman whereof I spake to thee yesterday, so do thou straightway bring her before me, that I may see what be her suit and fulfil her need.”"
• (archaic) With or by which.

adv

• (archaic) Of what.
  "Anthonio. [I]n ſooth I know not why I am ſo ſad, It wearies me: you ſay it wearies you; But how I caught it, found it, or came by it, What ſtuffe ’tis made of, whereof it is borne, I am to learne: and ſuch a Want-wit ſadnesse makes of mee, That I haue much ado to know my ſelfe."
• (archaic) Of which.