Old sheepskin Synonyms

Definitions for Old

(adjective) being of advanced years and especially past middle age
(adjective) dating or surviving from the distant past
(adjective) having been such at some previous time

OS abbreviation

OS is an abbreviation for Old Sheepskin

What does OS stand for?

OS stands for "Old Sheepskin"

Sheepskin replaced

Definitions for Sheepskin

(noun) tanned skin of a sheep with the fleece left on; used for clothing
(noun) skin of a sheep or goat prepared for writing on
(noun) a document certifying the successful completion of a course of study