definition of
profound

[1] #1 profound s. [fundamental] far-reaching and thoroughgoing in effect especially on the nature of something; "the fundamental revolution in human values that has occurred"; "the book underwent fundamental changes"; "committed the fundamental error of confusing spending with extravaga. wn

[2] #2 profound s. coming from deep within one; "a profound sigh". wn

[3] #3 profound s. [heavy, sound, wakeless] (of sleep) deep and complete; "a heavy sleep"; "fell into a profound sleep"; "a sound sleeper"; "deep wakeless sleep". wn

[4] #4 profound s. [unfathomed, unplumbed, unsounded] situated at or extending to great depth; too deep to have been sounded or plumbed; "the profound depths of the sea"; "the dark unfathomed caves of ocean"-Thomas Gray; "unplumbed depths of the sea"; "remote and unsounded caverns". wn