Retiring, a.
1. Reserved; shy; not forward or obtrusive; as, retiring modesty; retiring manners.
2. Of or pertaining to retirement; causing retirement; suited to, or belonging to, retirement. Retiring board (Mil.), a board of officers who consider and report upon the alleged incapacity of an officer for active service. -- Retiring pension, a pension granted to a public officer on his retirement from office or service.
Shades of meaning
Fernald lists retiring only as an antonym, under meddlesome.
He lists it without comment; the entries above explain its neighbors.
Synonyms
none given