[L.: cf. F. possesseur.]
One who possesses; one who occupies, holds, owns, or controls; one who has actual participation or enjoyment, generally of that which is desirable; a proprietor. «Possessors of eternal glory.» Law.

As if he had been possessor of the whole world.

Syn. -- Owner; proprietor; master; holder; occupant.

Webster 1913 Dictionary edited by Patrick J. Cassidy