opener
(noun)
noun
1. the first event in a series
- she played Chopin for her opener
- the season's opener was a game against the Yankees
Definition categories: event, start
2. a person who unfastens or unwraps or opens
Similar word(s): undoer, unfastener
Definition categories: person, individual, mortal, somebody, someone, soul
3. a hand tool used for opening sealed containers (bottles or cans)
Definition categories: man–made