1. (a.) Descending far below the surface; opening or reaching to a great depth; deep.

2. (a.) Intellectually deep; entering far into subjects; reaching to the bottom of a matter, or of a branch of learning; thorough; as, a profound investigation or treatise; a profound scholar; profound wisdom.

3. (a.) Characterized by intensity; deeply felt; pervading; overmastering; far-reaching; strongly impressed; as, a profound sleep.

4. (a.) Bending low, exhibiting or expressing deep humility; lowly; submissive; as, a profound bow.

5. (n.) The deep; the sea; the ocean.

6. (n.) An abyss.

7. (v. t.) To cause to sink deeply; to cause to dive or penetrate far down.

8. (v. i.) To dive deeply; to penetrate.

Atlantean Brobdingnagian Cyclopean Gargantuan Herculean Homeric absolute absorbing abstract abstruse abysmal acute analytical ankle-deep arcane arrant astronomic astute awful broad-minded cabbalistic civilized classical colossal complete consummate crass cryptic cultivated cultured decided deep deep-cut deep-down deep-engraven deep-felt deep-fixed deep-laid deep-lying deep-reaching deep-rooted deep-seated deep-set deep-settled deep-sinking deep-sunk deep-sunken deepgoing deepish deepsome definitive discerning downright educated egregious elephantine encyclopedic enigmatic enormous epic erudite esoteric extreme flagrant giant giantlike gigantic glaring great gross hard heartfelt heavy hermetic heroic hidden homefelt huge immense incomprehensible indecipherable indelible infinite informed inscrutable insightful intellectual intense intolerable intricate involved jumbo keen knee-deep knotty knowing knowledgeable learned lettered literate mammoth mighty monster monstrous monumental mountainous mysterious mystifying obscure occult out-and-out outright overpowering overwhelming pansophic penetrating perfect pervading piercing poignant polyhistoric polymath polymathic positive precious prodigious pronounced proper puzzling rank recondite regular sagacious sage sapient scholarly scholastic secret sharp shattering shocking sincere stark stark-staring studious stupendous subtle superlative surpassing terrible the veriest thorough thoroughgoing titanic total towering transcendental tremendous tricky unbearable unconscionable undeniable unequivocal unfathomable unmitigated unqualified unrelieved unspoiled utter vast well-informed well-read wise wise as Solomon