Open-raise
Being the first player to raise preflop, after everyone before you has folded.
Example
Everyone folds to you on the button and you raise to 6: you open.
Also written: open, opens, opened, open raise, opening raise, open-raising, open-raises.
Related
Practise it in 5 minutes Where they raised from, a short free lesson.
Quads is for adults, 18 and over. It teaches with play chips only: there is no real money, ever.