definition of abyss
Wiktionary(0.00 / 0 votes)Rate this definition: 1  abyss(Noun) A bottomless or unfathomed depth, gulf, or chasm; hence, any deep, immeasurable. 2  abyss(Noun) Hell; the bottomless pit; primeval chaos. 3  abyss(Noun) Infinite time; a vast intellectual or moral depth. 4  abyss(Noun) The center of an escutcheon.