Britannica Dictionary definition of BEST superlative kind of 1good or of 2well one  a  : better than all Many others in good quality or worth You should don your best/?æs.t?.r??d/ any one of many small planets that go around the sun, that isn't viewed as a true World or a comet? ?????? ??? "???????" ????? ?? ?????????? ???? ??????? ??????????? ?