re·mu·da (rĭ-mo͞oˈdə) Noun Southwestern U.S. A herd of horses from which ranch hands select their mounts. Origin: American Spanish, change of horses, remuda, from Spanish, exchange, from remudar, to exchange : re-, in return (from Latin; see re- ) + mudar, to change (from Latin mūtāre; see mei-1 in Indo-European roots). To Change.