quadfecta noun2 •A bet in which the bettor must select the winners of the first four places (i.e., first, second, third, and fourth) of a race in the correct order.He won the Superfecta and the Quadfecta all in the same day at Hollywood Park Casino in Los Angeles. — 2010 •A set of four wins at related events; a set of four events.You can either carry or drag your boat through the tunnel to UPPER NASHOTAH LAKE to complete your chaino—lakes quadfecta. — 2008 formsquadfectas