ETYM Old Eng. gartier, French jarretičre, from Old Fren. garet bend of the knee, French jarret; akin to Spanish garra claw, Prov. garra leg. Related to Garrote.
A band (usually elastic) worn around the leg to hold up a stocking (or around the arm to hold up a sleeve); SYN. supporter.

To fasten with or as if with a garter.