Fatally adv. : In a manner proceeding from, or determined by, fate.

Fatally adv. : In a manner issuing in death or ruin; mortally; destructively; as, fatally deceived or wounded.

Example:
What does a Fatally wounded Marine think about in his last moments of fast disappearing life?

Taxonomy
Merriam-Webster Online Dictionary, Dictionary, webster, act of fate, Word Games, Webster Online Dictionary with audio pronunciations, thesaurus, Google Search, Custom Search, glossary, english, language, ESL, Search, ly, adverb, 15th century, death.

Defination from the web:
fatally from the Merriam-Webster Online Dictionary with audio pronunciations, thesaurus, Word of the Day, and word games. ... fatally. One entry found. Main Entry: fa·tal·ly. Function: adverb. Date: 15th century. 1 : in a way determined by fate ...