More private; intimate; less formal; surreptitious; out of sight; second best. Behind: Repressed urges; one’s past and memories; what is ‘behind’ one, or is in the past, but may be influencing one again; one’s inner feelings; inferior. Idioms: At the back of; at the back of one’s mind; back room boys; by the back stairs/door; behind one’s back; take a back seat. See: front; left behind.
