Wiktionary
dead on
a. very accurate adv. (context idiomatic English) exactly at
Usage examples of "dead on".
Collie looked at the boy lying facedown and dead on his lawn, his clothes already damp from the lawn sprinkler (and the papers that had spilled out of his carrysack turning a soggy gray), and then at the van.
It gave Collie Entragian a queer, thoughtful feeling to realize that the boy who would have restocked the rack with a supply of the current issue was lying dead on his lawn.