Strong's #113: 'adown (pronounced aw-done')
 or (shortened) adon {aw-done'}; from an unused root (meaning to rule); sovereign, i.e. controller (human or divine):-- lord, master, owner. Compare also names beginning with "Adoni-".
Brown-Driver-Briggs Hebrew Lexicon:
 / 
  'âdôn / 'âdôn 
 
 1) firm, strong, lord, master
 
 1a) lord, master
 
 1a1) reference to men
 
 1a1a) superintendent of household,of affairs
 1a1b) master
 1a1c) king
 
 1a2) reference to God
 
 1a2a) the Lord God
 1a2b) Lord of the whole earth
 
 1b) lords, kings
 
 1b1) reference to men
 
 1b1a) proprietor of hill of Samaria
 1b1b) master
 1b1c) husband
 1b1d) prophet
 1b1e) governor
 1b1f) prince
 1b1g) king
 
 1b2) reference to God
 
 1b2a) Lord of lords (probably = "thy husband, Yahweh" )
 
 1c) my lord, my master
 
 1c1) reference to men
 
 1c1a) master
 1c1b) husband
 1c1c) prophet
 1c1d) prince
 1c1e) king
 1c1f) father
 1c1g) Moses
 1c1h) priest
 1c1i) theophanic angel
 1c1j) captain
 1c1k) general recognition of superiority
 
 1c2) reference to God
 
 1c2a) my Lord,my Lord and my God
 1c2b) Adonai (parallel with Yahweh)
 
  Part of Speech: noun masculine
Relation: from an unused root (meaning to rule)
Usage:
This word is used 335 times:
1 Kings 1:21: "Otherwise it shall come to pass,  when my lord the king shall sleep with his fathers, that I and my son"
1 Kings 1:24: "And Nathan said,  My lord, O king, hast thou said, Adonijah shall reign"
1 Kings 1:27: "thing done by  my lord the king, and thou hast not showed it unto"
1 Kings 1:27: "who should sit on the throne  of my lord the king after"
1 Kings 1:31: "and did reverence to the king, and said,  Let my lord David live forever."
1 Kings 1:33: "with you the servants  of your lord, and cause my son to ride"
1 Kings 1:36: "Amen: God  of my lord the king say so"
1 Kings 1:37: "the LORD hath been with  my lord the king, even so be"
1 Kings 1:37: "Solomon, and make his throne greater than the throne  of my lord king"
1 Kings 1:43: "and said to Adonijah, Verily  our lord king David"
1 Kings 1:47: "came to bless  our lord king saying, God"
1 Kings 2:38: "The saying is good: as  my lord the king so will thy servant"
1 Kings 3:17: "woman said, O  my lord, I and this woman"
1 Kings 3:26: "her son, and she said, O  my lord, give her the living child,"
1 Kings 11:23: "which from  his lord Hadadezer king of Zobah:"
1 Kings 12:27: "people turn again unto  their lord, even unto Rehoboam king of Judah,"
1 Kings 16:24: "he built, after the name of Shemer,  owner of the hill, Samaria."
1 Kings 18:7: "and said, Art thou that  my lord Elijah?"
1 Kings 18:8: "him, I am: go, tell  thy lord, Behold, Elijah"
1 Kings 18:10: "nation or kingdom, whither  my lord hath not sent to seek"
1 Kings 18:11: "sayest, Go, tell  thy lord, Behold, Elijah"
1 Kings 18:13: "Was it not told  my lord what I did when Jezebel slew"
1 Kings 18:14: "sayest, Go, tell  thy lord, Behold, Elijah"
1 Kings 20:4: "of Israel answered and said,  My lord, O king, according to thy saying, I"
1 Kings 20:9: "unto the messengers of Ben-hadad, Tell  my lord the king, All that"
1 Kings 22:17: "said, These have no  master: let them return every man to his house in peace."
2 Kings 2:3: "the LORD will take away  thy master from thy head today?"
2 Kings 2:5: "the LORD will take away  thy master from thy head today?"
2 Kings 2:16: "let them go, we pray thee, and seek  thy master: lest peradventure the Spirit of the LORD"
2 Kings 2:19: "is pleasant, as  my lord seeth: but the water is naught, and the ground"
2 Kings 4:16: "a son. Nay,  my lord, thou man of God, do not lie"
2 Kings 4:28: "Did I desire a son of  my lord? did I not say, Do not"
2 Kings 5:1: "a great man  his master, and honorable, because by him the LORD"
2 Kings 5:3: "unto her mistress, Would God  my lord were with the prophet that"
2 Kings 5:4: "And one went in, and told  his lord, saying, Thus and thus said the maid"
2 Kings 5:18: "the LORD pardon thy servant,  that when my master goeth into the house to worship"
2 Kings 5:20: "of God, said, Behold,  my master Naaman this"
2 Kings 5:22: "And he said, All is well.  My master hath sent me, saying, Behold, even now"
2 Kings 5:25: "went in, and stood before  his master. And Elisha said unto"
2 Kings 6:5: "and said, Alas,  master! for it was borrowed."
2 Kings 6:12: "of his servants said, None,  my lord, O king: but Elisha,"
2 Kings 6:15: "said unto him, Alas,  my master! how shall we do?"
2 Kings 6:22: "and drink, and go to  their master."
2 Kings 6:23: "he sent them away, and they went to  their master. So the bands of Syria came no"
2 Kings 6:26: "him, saying, Help,  my lord, O king."
2 Kings 6:32: "and hold him fast at the door: is not the sound  of his master's feet behind"
2 Kings 8:5: "her house and for her land. And Gehazi said,  My lord, O king, this"
2 Kings 8:12: "said, Why weepeth  my lord? And he answered, Because I know"
2 Kings 8:14: "from Elisha, and came to  his master; who said to him, What"
2 Kings 9:7: "the house of Ahab  thy master, that I may avenge the blood of my servants"