plural combines
1
a
: a combination especially of business or political interests
… Grumman Corp. lost the advanced tactical aircraft contract to the combine of McDonnell Douglas and General Dynamics.—
George J. Church
b
: an event at which scouts from the teams in a professional sports league gather to evaluate players in preparation for choosing which players to draft
a scouting combine
Every spring the National Football League conducts that most cherished of American rituals, the college draft. A couple of months before the event, prospective players show off their abilities in an athletic audition known as the combine.—
Carl Zimmer
2
: a harvesting machine that heads, threshes, and cleans grain while moving over a field
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Merriam-Webster unabridged



