What does it mean when it says that the Christian is "dead to sin"?

 Ro 6:11 Likewise you also, reckon yourselves to be dead indeed to sin, but alive to God in Christ Jesus our Lord.

* In verse 2, someone who is dead to sin should no longer live in it:

Ro 6:2 Certainly not! How shall we who died to sin live any longer in it?

* In verse 4, someone who is dead to sin (buried with Christ) should walk in newness of life:

Ro 6:4 Therefore we were buried with Him through baptism into death, that just as Christ was raised from the dead by the glory of the Father, even so we also should walk in newness of life.

* In verse 6, someone who is dead to sin is no longer sin's slave:

Ro 6:6 knowing this, that our old man was crucified with Him, that the body of sin might be done away with, that we should no longer be slaves of sin.

* In verse 7, someone who is dead to sin, is freed from sin:

Ro 6:7 For he who has died has been freed from sin.

* In verse 12, someone who is dead to sin should not let sin reign in his life:

Ro 6:12 Therefore do not let sin reign in your mortal body, that you should obey it in its lusts.