adverb
Etymology: Middle English gretely, from grete great + -ly — more at great
1. : to a great extent or high degree
contributed greatly to the improvement of international relations
: very
not greatly bothered by the rude remarks
: very much
said he liked her greatly — Arnold Bennett
a greatly intensified sound
greatly in want of a friend — G.B.Shaw
2. : in a great manner : nobly , magnanimously
a man may live greatly in the law — O.W.Holmes †1935