fill ‧ er /ˈfɪlə $ -ər/ BrE AmE noun [uncountable and countable]
[ Word Family: noun : ↑ fill , ↑ refill , ↑ filling , ↑ filler ; verb : ↑ fill , ↑ refill ; adjective : ↑ filling ]
1 . British English a substance used to fill cracks in wood, walls etc, especially before you paint them
2 . stories, information, pictures etc that are not important but are used to fill a page in a newspaper or magazine