Definition of "first appearance" []

• The act of beginning something new (noun)

WordNet. Princeton University. 2010.

• "Following closely after the highly effective Constitution-class refit program, the upgrade marked the first appearance of the configuration which would later become the Miranda-class."
• "In the Western Frankish Empire it made its first appearance probably towards the end of the Carlovingian dynasty, that is, in the course of the tenth century."
• "Grief made its first appearance in the DSM-III, published in 1980, in an entry for “Uncomplicated Bereavement,” which was defined as a “normal reaction to the death of a loved one” that occurs within the first two or three months of the loss."