1.
family group; people out with their families
A family out together, typically parents with children, as visitors at a park, a resort or a shop.
連れ (from 連れる, to take along) means "with … along". Compare 子連れ (with one's children) and 二人連れ (a pair). 家族連れ usually refers to groups seen at leisure places, often in news about holiday crowds.