Source : Webster's Revised Unabridged Dictionary (1913)

Adonist \A*do"nist\ ([.a]*d[=o]"n[i^]st), n. [Heb.
   [a^]d[=o]n[=a]i my Lords.]
   One who maintains that points of the Hebrew word translated
   ``Jehovah'' are really the vowel points of the word
   ``Adonai.'' See {Jehovist}.