expert skill or knowledge; expertness; know-how

business expertise.

a written opinion by an expert, as concerning the authenticity or value of a work of art, manuscript, etc.

noun

ability , ableness , adroitness , aptness , art , bag , chops , cleverness , command , competence , craft , cunning , deftness , dexterity , dodge , expertness , facility , finesse , goods , ingeniousness , judgment , knack , know-how , line , makings , masterliness , mastery , oil , one\'s thing , proficiency , prowess , readiness , savvy , sharpness , skill , skillfulness , stuff , adeptness , technique