Deathly a. : Deadly; fatal; mortal; destructive.

Deathly adv. : Deadly; as, deathly pale or sick.

Example:
What Happened to the HP Characters After the Deathly Hallows?

Taxonomy
manner of death, Dictionary, Synonyms, adjective, ly, deathly silence, word origin, Houghton Mifflin Company, free online English dictionary, dictionary results, pronunciation, free online dictionary, definitions, websters, spelling, vocabulary, idioms, Copy & paste.

Defination from the web:
Deathly - Definition of Deathly at Dictionary.com a free online dictionary with pronunciation, synonyms, and translation of Deathly. Word of the Day and Crossword Puzzles. ... Search another word or see deathly on Thesaurus | Reference. Facebook Twitter Follow us: ...