1.Definition: (of sleep) deep and complete

"Fell into a profound sleep"

Related Adjective(s):heavy, sound, wakeless

2.Definition: coming from deep within one

"A profound sigh"

3.Definition: far-reaching and thoroughgoing in effect especially on the nature of something

"Profound social changes"

Related Adjective(s):fundamental

4.Definition: of the greatest intensity; complete

"A profound silence", "A state of profound shock"

5.Definition: showing intellectual penetration or emotional depth

"The differences are profound", "A profound insight", "A profound book", "A profound mind", "Profound contempt", "Profound regret"

6.Definition: situated at or extending to great depth; too deep to have been sounded or plumbed

"The profound depths of the sea"

Related Adjective(s):unfathomed, unplumbed, unsounded