1. one who oversees the property or affairs of another, manager; one who is hired to run an estate or other establishment; one who tends to passengers on an airplane (or ship, etc.). stewardsteward, v. t. to manage as a steward. [obs.]steward steward , n. [oe. stiward, as. stīweard, stigweard, literally, a sty ward; stigu sty + weard warden, guardian, -- his first duty having been probably to attend to the domestic animals. ?164. see: sty pen for swine, ward.]