Definitions for "Maximum Card"
A picture postcard, a cancel, and a stamp presenting maximum concordance. The stamp is usually affixed to the picture side of the card and is tied by the cancel. Collectors of maximum cards seek to find or create cards with stamp, cancel and picture in maximum agreement, or concordance.
a picture postcard to which a stamp has been affixed to the view side of the card, and then cancelled
a Postage Stamp, Picture Postcard and Cancellation (Postmark), with Maximum Concordance between elements