What does adonai mean?
The definition of adonai
Ad`o*na”i, n. [Heb. adonai, lit., my lord.]
A Hebrew name for God, usually translated in the Old Testament by the word “Lord”.
The later Jews used its vowel points to fill out the tetragrammaton Yhvh, or Ihvh, “the incommunicable name,” and in reading substituted “Adonai”.