family in mourning; bereaved family
Refers to a household that has recently lost a member and is observing mourning customs. The 'homeless' gloss is a rare, archaic or literary extension; modern Japanese uses ホームレス or 家のない for homelessness.
A family in mourning refrains from festive events for a while.
近所の喪家に弔問に行った。
I went to offer condolences to the bereaved family in the neighborhood.
feeling lost like a stray dog
Compound of 喪 (mourning) and 家 (house, family). The 'homeless' meaning may derive from classical Chinese usage, but is now obsolete in Japanese.