Firm; fast; stable; permanent; of a determinate or unfluctuating character; hence, appointed; settled; established: as, fixed laws; a fixed sum; fixed prices; a fixed time; fixed habits or opinions.Permanently placed or situated; established as to position or relation: as, the planets have fixed orbits; the fixed stars (so called from their always appearing to occupy the same place).In heraldry, same as firme.In zoology, not free or locomotory; rooted or otherwise attached to some object.In com., without grace or days of grace: said of drafts and other commercial papers payable on a specified date without grace.