Meaning of SERIOUS in English
(DETERMINED) [adjective] [after verb] - determined to follow a particular plan of actionIf you're serious about becoming an actress you need proper training.Is she serious about going to live abroad?If two people who have a loving relationship are serious about each other they intend to stay with each other for a long time and possibly marry.She's had a lot of boyfriends but Simon's the only one she's been serious about.
Cambridge English vocab. Кембриджский английский словарь. 2012