National League, theˌNational ˈLeague 
one of two groups of professional baseball teams that make up the highest level of baseball in the US and Canada. Every year, the team that wins in this league plays against the winning team of the American League in the World Series. → baseball
one of two groups of professional baseball teams that make up the highest level of baseball in the US and Canada. Every year, the team that wins in this league plays against the winning team of the American League in the World Series. → baseball- operatically
- operating room
- operating system
- operating table
- operating theatre
- operation
- operational
- operationally
- operational research
- Operation Desert Storm
- Operation Iraqi Freedom
- Operation Overlord
- operative
- operator
- operetta
- Ophelia
- ophthalmic
- ophthalmologist
- ophthalmology
- opiate
- opine
- opinion
- opinionated
- opinion-makers
- opinion poll