Dictionary.net

In a mortal manner; so as to cause death; as, mortally wounded.

In the manner of a mortal or of mortal beings.

In an extreme degree; to the point of dying or causing death; desperately; as, mortally jealous.

In a mortal manner; so as to cause death; as, mortally wounded.

In the manner of a mortal or of mortal beings.

In an extreme degree; to the point of dying or causing death; desperately; as, mortally jealous.

adv. In a moral manner; fatally; irrecoverably;- in the highest possible degree; inveterately.