late 14c., used in Revelations ix.11 of "the angel of the bottomless pit," and by Milton of the pit itself, from Hebrew Abhaddon, literally "destruction," from abhadh "he peri [..]

Originally the name of the Warmaster of Chaos, Abaddon is now a word uses to refer to a metal ore prosthetic penis.

Abaddon [N] [B] [H] [S]destruction, the Hebrew name (equivalent to the Greek Apollyon, i.e., destroyer) of "the angel of the bottomless pit" ( Revelation 9:11 ). It is rendered "destruc [..]

Abaddon [N] [B] [E] [S] the destroyer

destruction, the Hebrew name (equivalent to the Greek Apollyon, i.e., destroyer) of "the angel of the bottomless pit" (Rev. 9:11). It is rendered "destruction" in Job 28:22; 31:12; [..]

See Apollyon.

Abaddon. the destroyer

The angel of the bottom-less pit (Rev. ix. 11). The Hebrew abad means “he perished.”

(Hebrew אבדון) destruction.

The destroyer, or angel of the bottomless pit; Apollyon; Asmodeus. First attested from 1350 to 1470SOED5|page=2 (poetic) Hell; the bottomless pit; a place of destruction. Late [..]

Means "ruin, destruction" in Hebrew. In Revelation in the New Testament this is another name of the angel of the abyss.