Longman Dictionary of Contemporary English
first-ever
adjective
EXAMPLES FROM CORPUS
▪ According to the official program of the Games, it was the first-ever Olympic triathlon.
▪ However, this is by no means the first-ever space station.
▪ Released 25 years ago, the recording became the unofficial anthem of my first-ever election campaign.
Usage examples of "first-ever".
All the other clerks in the chamber peered awestricken over their counting desks at what must have been a first-ever occurrence.
And Ali Baba got his first-ever laugh just by walking into the pista, for Zanni had done his makeup like that of the Tambo or Bones in an American minstrel show.