A movable barrier used to close off an entrance to a building, room, or vehicle

Mlango wa nyumba umefungwa kwa kufuli.
— The door of the house is locked with a padlock.
Tafadhali fungua mlango ili watu wote waingie.
— Please open the door so that everyone can enter.
An opportunity or chance to do something
Masomo yamefungua mlango wa kazi nzuri.
— Education has opened the door to good jobs.
Mlango wa ushirika katika kampuni umefunguliwa kwa wote.
— The opportunity for partnership in the company has been opened to everyone.