(1):
(adv.) Very; with a tendency to darkness of color.
(2):
(adv.) Profoundly; thoroughly; not superficially; in a high degree; intensely; as, deeply skilled in ethics.
(3):
(adv.) At or to a great depth; far below the surface; as, to sink deeply.
(4):
(adv.) With profound skill; with art or intricacy; as, a deeply laid plot or intrigue.
(5):
(adv.) Gravely; with low or deep tone; as, a deeply toned instrument.