Definition of: profound

(prə·found′) adjective
1. Intellectually deep; thorough; exhaustive: profound learning.
2. Reaching to, arising from, or affecting the depth of one's nature or of any matter: profound respect.
3. Situated far below the surface; deep; unfathomable.
4. Bent low: said of a bow.
—noun
1. A fathomless depth; an abyss.
2. The ocean; the deep. See synonyms under OBSCURE, WISE. [<OF profond <L profundus <pro- very + fundus deep]
—pro·found′ly adverb
—pro·found′ness noun