A major is one of the bigger tournaments of the year. There is The Masters, The US Open, The Open Championship, and The PGA Championship.
The generic usage is "a year""There are four major tennis tournaments a year.
The Grand Slam in golf is all 4 men's professional major championships in one year. That is The Masters, US Open, The Open and PGA Championship. So 4, but the main problem is getting into The Masters, it has an elite field of less than 100 players, therefore you would need to play a lot of tournaments to get into it.
Bobby Jones won the US Open, US Amateur, British Open and British Amateur all in 1930.
Based on performances from other tournaments or the performance of last years tournament you get in the tournament for that year for free or for a discount.
There are many major tournaments for poker players both online and live. The biggest live tournament is the World Series of Poker which is held every year in Las Vegas. Online the biggest tournament is the Pokerstars Sunday Millions.