Definition of: superscription

(s′pər·skrip′shən) noun
1. The act of superscribing an address on a letter.
2. An upper or outer inscription, as a title or a direction; especially, an address on a letter.
3. That portion of a medical prescription that begins with the word recipe (generally abbreviated R, and meaning “take”). [<OF <LL superscriptio, -onis <superscribere. See SUPERSCRIBE.]