From BiblePortal Wikipedia

Holman Bible Dictionary [1]

 Isaiah 49:17 Jeremiah 22:7 Exodus 12:23 Hebrews 11:28 2 Samuel 24:15-16 2 Kings 19:35 Psalm 78:49

Easton's Bible Dictionary [2]

 Exodus 12:23 2 Kings 19:35 2 Samuel 24:15,16 Psalm 78:49 Acts 12:23

Webster's Dictionary [3]

(1): ( n.) = Torpedo-boat destroyer.

(2): ( n.) One who destroys, ruins, kills, or desolates.

King James Dictionary [4]

Destroyer n. One who destroys, or lays waste one who kills a man, or an animal, or who ruins a country, cities, &c.

International Standard Bible Encyclopedia [5]

dē̇ - stroi´ẽr  : In several passages the word designates a supernatural agent of destruction, or destroying angel, executing Divine judgment. (1) In  Exodus 12:23 , of the "destroyer" who smote the first-born in Egypt, again referred to under the same title in  Hebrews 11:28 the Revised Version (British and American) (the King James Version "he that destroyed"). (2) In   Job 33:22 , "the destroyers" (literally, "they that cause to die") = the angels of death that are ready to take away a man's life during severe illness. No exact parallel to this is found in the Old Testament. The nearest approach is "the angel that destroyed the people" by pestilence ( 2 Samuel 24:16 ,  2 Samuel 24:17 parallel   1 Chronicles 21:15 ,  1 Chronicles 21:16 ); the angel that smote the Assyrians ( 2 Kings 19:35 =   Isaiah 37:36 parallel   2 Chronicles 32:21 ); "angels of evil" ( Psalm 78:49 ). (3) In the Apocrypha, "the destroyer" is once referred to as "the minister of punishment" (Revised Version; literally, "him who was punishing"), who brought death into the world (The Wisdom of Solomon 18:22-25). (4) In  1 Corinthians 10:10 , "the destroyer" is the angelic agent to whose instrumentality Paul attributes the plague of  Numbers 16:46-49 .

In later Jewish theology (the Targums and Midrash), the "destroyer" or "angel of death" appears under the name Sammael (i.e. the poison of God), who was once an arch-angel before the throne of God, and who caused the serpent to tempt Eve. According to Weber, he is not to be distinguished from Satan. The chief distinction between the "destroyer" of early thought and the Sammael of later Judaism is that the former was regarded as the emissary of Yahweh, and subservient to His will, and sometimes was not clearly distinguished from Yahweh Himself, whereas the latter was regarded as a perfectly distinct individuality, acting in independence or semi-independence, and from purely malicious and evil motives. The change was largely due to the influence of Persian dualism, which made good and evil to be independent powers.

Cyclopedia of Biblical, Theological and Ecclesiastical Literature [6]

( מִשְׁחַית )PM, Mashchith' ,  Exodus 12:23; Λοθρευτής ,  1 Corinthians 10:10), an exterminator (see Bromel, De angelo exterminatore, Jen. 1685; also in the Thesaur. Theol. philolog. V. T. 1:301 sq.). (See Death). The Hebrews were accustomed by a figure to speak of any superhuman agency as that of an angel (see Bush, Note On  Exodus 3:2); and whenever this had a providential aspect it was attributed to a divine messenger ( 2 Kings 19:35;  2 Samuel 24:15,"16;  Psalms 78:49;  Acts 12:23). (See Angel). Even Satan's malignity is represented as thus employed ( Job 2:6-7). (See Abaddon).