1. (adv.) At or to a great depth; far below the surface; as, to sink deeply.

2. (adv.) Profoundly; thoroughly; not superficially; in a high degree; intensely; as, deeply skilled in ethics.

3. (adv.) Very; with a tendency to darkness of color.

4. (adv.) Gravely; with low or deep tone; as, a deeply toned instrument.

5. (adv.) With profound skill; with art or intricacy; as, a deeply laid plot or intrigue.

acutely completely deep emotionally entirely extremely gravely greatly heavily intensely irrevocably keenly passionately powerfully profoundly seriously severely strongly thoroughly unreservedly very much