I. ˈōp(ə)nə(r) noun
( -s )
Etymology: open (II)
: one that opens
a can opener
as
a. obsolete : aperient
b. : a machine in which textile fiber (as cotton) is loosened and partially cleaned
c. openers plural : cards of sufficient value for a player to open the betting in a poker game
d. : the first item on a multiple bill (as of vaudeville acts) or of a series (as of professional baseball games)
II.
comparative of open