Meaning of card-carrying

card-car•ry•ing

Pronunciation: (kärd'kar"ē-ing), [key]
— adj.
  1. admittedly belonging to a group or party: a card-carrying Communist.
  2. dedicated to an ideal, profession, or interest: a card-carrying humanist.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.