v. exchange on a regular basis; "We rotate the lead soprano every night"

v. perform a job or duty on a rotating basis; "Interns have to rotate for a few months"

v. turn on or around an axis or a center; "The Earth revolves around the Sun"; "The lamb roast rotates on a spit over the fire"

v. turn outward; "These birds can splay out their toes"; "ballet dancers can rotate their legs out by 90 degrees"

v. cause to turn on an axis or center; "Rotate the handle"

v. plant or grow in a fixed cyclic order of succession; "We rotate the crops so as to maximize the use of the soil"