Definitions of onea:

• adjective:   used informally as an intensifier
• adjective:   of the same kind or quality
• adjective:   being one in number--a single unit or thing
• adjective:   being the single appropriate individual of a kind; only
• adjective:   having the indivisible character of a unit
• adjective:   indefinite in time or position
• adjective:   particular but unspecified
• adjective:   eminent beyond or above comparison