1) Pertaining to peers 
Nobiliary (foaled 14 February 1972) was an American-bred, French-trained Thoroughbred racehorse and broodmare. She recorded her biggest win in the Washington D C International in 1975, a year in which she became (and remains) the only filly since 1916 to finish placed in the Derby Stakes. As a two-year-old she won one minor race but showed promise...
of, like or pertaining to nobility
• (n.) A history of noble families. • (a.) Of or pertaining to the nobility. • (a.) Of or pertaining to the nobility. • (n.) A history of noble families.
No·bil'ia·ry adjective [ French nobiliare . See Noble .] Of or pertaining to the nobility. Fitzed. Hall. 
of or pertaining to the nobility.