1. (

• profound

) showing intellectual penetration or emotional depth; "the differences are profound"; "a profound insight"; "a profound book"; "a profound mind"; "profound contempt"; "profound regret" ;

2. (

• profound

) of the greatest intensity; complete; "a profound silence"; "a state of profound shock" ;

3. (

• fundamental ,
• profound

) 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 extravagance"; "profound social changes" ;

4. (

• profound ,

) coming from deep within one; "a profound sigh" ;

5. (

• heavy ,
• profound ,
• sound ,
• wakeless

) (of sleep) deep and complete; "a heavy sleep"; "fell into a profound sleep"; "a sound sleeper"; "deep wakeless sleep" ;

6. (

• profound ,
• 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" ;