Card1  n. 1 thick stiff paper or thin pasteboard. 2 a piece of this for writing or printing on, esp. To send greetings, to identify a person, or to record information. B small rectangular piece of plastic used for identity etc. 3 a = *playing-card. B (in pl.) Card-playing. 4 (in pl.) Colloq. Tax and national insurance documents etc., held by an employer. 5 programme of events at a race-meeting etc. 6 colloq.