Definition of opener | Bee Dictionary of English

n the first event in a series
she played Chopin for her opener
the season's opener was a game against the Yankees
n a person who unfastens or unwraps or opens
n a hand tool used for opening sealed containers (bottles or cans)

Hawks come out swinging in opener
The Hawks won their season opener for the first time since 2008 on Friday night.
June 15, 2013 - The Idaho Statesman
Bryce Miller: Hawkeyes football opener will set tone
We interrupt the fading days of spring with a question to ponder between now and the time footballs take flight … When was the last time Iowa played a bigger season-opener in helmets and shoulder pads than the one parked on Aug. 31 against Northern Illinois? And when did a season-starter with that much on [...]
June 15, 2013 - The Iowa City Press-Citizen
Video: Eye Opener: Syria crossed "red line," U.S. says
The United States confirms Syria crossed a red line by using chemical weapons. Now President Obama is ready to help the rebels. Also, Colorado's worst wildfire ever turns deadly. Plus, a neighbor helped the FBI catch reputed Boston mobster "Whitey" Bulger. All that, and all that mattered, in today's "Eye Opener."
June 14, 2013 - CBS News

Carlos Dunga in The Associated Press
The opener is always harder,Dunga said. "There is the anxiety, the players are more nervous than usual, trying to do too much. But we are satisfied."
Ed Snider in USA Today
Because of the tremendous amount of publicity she has brought to our sport, we invited the most popular hockey mom in North America to our home opener to help us get our season started,Snider said in a team statement Wednesday. "We are...
Ray Tanner in Baseball America
The first day here we had the rain delay, and (his pitch count) was in the mid-60s, so I think that has helped him a little bit-the fact that he didn't run too many pitches out there in the opener,South Carolina coach Ray Tanner said. "But...