مُتَّصِلٌ: وَهُوَ مَا أُخْرِجَ عَنْ مُتَعَدِّدٍ بِـ«إِلَّا» وَأَخَوَاتِهَا، نَحْوُ: «جَاءَنِي الْقَوْمُ إِلَّا زَيْدًا».
Translation: A connected exception is excluded from a multiple-member group by illā or its counterparts, for example: The people came to me except Zayd.
In «جَاءَنِي الْقَوْمُ إِلَّا زَيْدًا», Zayd is a person who could belong to the group. He is excluded from the group that came.
Connected does not imply that Zayd arrived: the exception expressly excludes him.