I am going to go out on a limb here and say death is the state of not being alive.
Your statement does not add value. When Adam died after his sin, did he die spiritually, and then physically 930 years later? What is "not being alive" mean to you in the context of death referred to in Rom. 6:23 which you quoted? Does "death" mean spiritual death meaning separation from God? Or does it strictly mean physical death in which there is non-existent consciousness? I'm simply trying to get your idea of what the scripture means by "death." "The state of not being alive" sounds suspiciously like an evasion.