to make someoneunderstandmore andknowmore about differentsubjects,ideas,places, etc.:
They say thattravelbroadensthemind.
TheInternetcan givechildrenopportunitiestobroadentheirminds.
Do yousupposethetripbroadenedhismindin any way?
Thevitalthing aboutreadingis that itbroadensthemind.
Ihopedthat all these newexperiencesmightbroadenhermind.