in·vi·ta·tion·al 
/ˌɪnvəˈteɪʃənl̟/ adjective
/ˌɪnvəˈteɪʃənl̟/ adjective US, sports : limited to people who have been invited to compete
▪ an invitational tournament
▪ an invitational tournament
— invitational noun, plural invitationals [count]
▪ The tournament is an invitational.
▪ The tournament is an invitational.
