who . ( Of the lat. )( quem , acus. of qui ). 1. pron. relat. Referred to persons, equivalent to , which, who, etc., and at times, to which and its variants. My father, to whom respect. No gender, but number varies, and in the singular may refer to a plural antecedent. The people from whom I received favors. You can not build with article. 2. pron. relat. With implicit background, appoints the person as one who. Who goes bad, bad just. U m. in sing.