Adonai One Of The Names Of God.
But Abram said, “Lord God [Adonai], what will You give me, seeing I go childless, and the heir of my house is Eliezer of Damascus?” Genesis 15:2 NKJV
Adon (singular form). Means master, lord. Adon can refer to men (most uses) or God. Adonai only refers to God.
Pious Jews refuse to pronounce the name Jehovah (Yahweh) when reading the OT - when they come to the Name Jehovah, they will read it as "Adonai".
In the Septuagint (LXX) Adonai (and Jehovah) are translated with the same Greek noun kurios (see word study) which signifies sovereign power, supreme authority, absolute ownership. In the NT, Jesus is referred to <20 times as Savior (soter) and over 700 times as Lord (kurios)! When the two titles are mentioned together, Lord always precedes Savior
Adonai (plural form composed of Adon + "ai" = my) literally = "my Lords", usually translated "my Lord" or "Lord" (capital "L" followed by small letters. Contrast Jehovah which is rendered in all caps [LORD] in NAS, ESV, KJV). The plural form Adonai is said to be a plural of majesty like Elohim (although some say the plural form of both of these names of God points to the truth of the Trinity in the OT).