The Post Office honors great Americans philatelically.    From Wordnet, Princeton University. 

The countries philatelically represented seem to be exclusively smaller nation states, the viewer's eyes making connections to Oman's.    From Wordnik.com.  [Museum Blogs] Reference

The boring factual stuff is laid out right away to bring the un-philatelically minded up to speed on the value of rare and precious stamps; the two mentioned in the play really are worth millions.    From Wordnik.com.  [Dallas Observer | Complete Issue] Reference