An Etymological Dictionary of Astronomy and Astrophysics

Most reliable or complete (as of a text, author, criticism, study, judgement, or the like) that serves as a standard or reference point.

Etymology (EN): M.E., from O.Fr., from L. definitivus, from definit(us)→ definite + -ivus a suffix of adjectives.

Etymology (PE): Hedârâ, adj., from hedâr present stem of hedâridan→ define + adj. suffix -â.