General term for any competitive tournament, including round-robin and knockout formats.
I will participate in a tennis tournament next month.
knockout tournament; elimination tournament
Specifically refers to a single-elimination or knockout-style tournament, where losing once means elimination.
This tournament is a single-elimination format where you're out if you lose.
A tennis tournament will be held in Tokyo next week.
She ended up entering the national tournament.
Our team finally won the tournament.
This year's competition decided to adopt a knockout tournament format.
major tournament