Wiktionary(1.00 / 1 vote)Rate this definition: 1  profound(Noun) The deep; the sea; the ocean. God in the fathomless profound Hath all this choice commanders drowned. 2  profound(Noun) An abyss. 3  profound(Verb) To cause to sink deeply; to cause to dive or penetrate far down.  profound(Verb) To dive deeply; to penetrate.