a member of a major-league team.
Origin of major-leaguer
either of the two main professional baseball leagues in the U.S.
a league of corresponding stature in certain other sports, as ice hockey, football, or basketball.
Origin of major league
An Americanism dating back to 1880–85
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
US and Canadian a league of highest classification in baseball, football, hockey, etc
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012