The Collaborative International Dictionary
Killingly
Killing \Kill"ing\, a. Literally, that kills; having power to kill; fatal; in a colloquial sense, conquering; captivating; irresistible. -- Kill"ing*ly, adv.
Those eyes are made so killing.
--Pope.
Nothing could be more killingly spoken.
--Milton.
Wiktionary
killingly
adv. In a killing manner.
WordNet
killingly
adv. in a very humorous manner [syn: sidesplittingly]
Usage examples of "killingly".
Their pace was killingly slow, burdened by the grind of the two carts and the awkward seats of several of the monastics who, like Sigfrid, had never learned to ride and yet were too weak to walk far.