adv very; with a tendency to darkness of color.
2. deeply ·adv gravely; with low or deep tone; as, a deeply toned instrument.
3. deeply ·adv at or to a great depth; far below the surface; as, to sink deeply.
4. deeply ·adv with profound skill; with art or intricacy; as, a deeply laid plot or intrigue.
5. deeply ·adv profoundly; thoroughly; not superficially; in a high degree; intensely; as, deeply skilled in ethics.