In contrast to Jesus being raised from the dead, Paul writes about a person being “dead in [their] trespasses and sins.” He identifies, in detail, characteristics of people who are “spiritually dead” (Ephesians 2:1-3).
When Paul uses the word “dead” he is not speaking of being physically dead, but rather of being spiritually dead. One similarity between being physically dead and being spiritually dead is both incur a separation. In physical death there is the permanent separation of the air we breathe from our body. In the spiritual death, we are separated from God, resulting in us no longer being in a relationship with Him and no hope of being with Him eternally.