adjective
[ only before noun ] happening or working in three ways or directions, or between three people :
a three-way switch
a three-way discussion
adjective
[ only before noun ] happening or working in three ways or directions, or between three people :
a three-way switch
a three-way discussion
Oxford Advanced Learner's English Dictionary. Оксфордский английский словарь для изучающик язык на продвинутом уровне. 2005