Source : Webster's Revised Unabridged Dictionary (1913)

Hollyhock \Hol"ly*hock\, n. [OE. holihoc; holi holy + hoc
   mallow, AS. hoc; cf. W. hocys mallows, hocys bendigaid
   hollyhock, lit., blessed mallow. Prob. so named because
   brought from the Holy Land. See {Holy}.] (Bot.)
   A species of Alth[ae]a ({A. rosea}), bearing flowers of
   various colors; -- called also {rose mallow}.

Source : WordNet®

hollyhock
     n 1: any of various plants of the genus Althaea; similar to but
          having smaller flowers than genus Alcea [syn: {althea},
          {althaea}]
     2: any of various tall plants of the genus Alcea; native to the
        Middle East but widely naturalized and cultivated for its
        very large variously colored flowers