My definition of Rites of Passage are ceremonies that mark important/significant events that happen in a person's life. Wiccan's have many celebrations that can be performed and celebrated.
Belly Blessings- performed on mothers-to-be as a blessing for both mom and child. Mom can also be pampered during these ceremonies.
Wiccaning/Naming Ceremonies- done once a child is born. The child is blessed and introduced to the gods and elements. Different traditions will have different ways of doing this.
Becoming a Woman- done for girls who have started menstruating.
Becoming a Man- done for boys who are entering teen years.
Handfasting/Marriage- this can be a spiritual or legal ceremony, joining a couple together as husband and wife, or partners. In older times a Handfasting was for a year a day, but now people tend to go longer :)
Divorce/Handparting- done when a marriage or partnership ends.
Croning or Saging- done for elders who are ready to enter the next stage of their life.
Death- service to honor the dearly departed.
Other rites of passage can also include initiation into a coven or even your own dedication to your gods can be viewed as a rite of passage.
What rites do you celebrate in your faith?