adj.
1.causing or capable of causing death
2.of an instrument of certain death
3.extremely poisonous or injurious
4.involving loss of divine grace or spiritual death
5.exceedingly harmful
6.(of a disease) having a rapid course and violent effect deadly adv.
1.as if dead
2.as if produced by death
3.(used as intensives) extremely
Idiom of the Day
a slip of the tongue
something that is said at the wrong time and is not what you want to say
The clerk's comment to the customer was a slip of the tongue.