filler1Pronunciation: /ˈfɪlə/Translate filler | into French | into Italian | into Spanish Definition of filler noun 1 [usually in combination] a thing put in a space or container to fill it:these plants are attractive gap-fillers or ground cover [mass noun] a substance used for filling cracks or holes in a surface, especially before painting it:wood filler [mass noun] material used to fill a cavity or increase bulk:foam filler an item serving only to fill space or time in a newspaper, broadcast, or recording. a word or sound filling a pause in an utterance or conversation (e.g. er, well, you know). a linguistic unit that fills a particular slot in syntactic structure. 2 [in combination] a person or thing that fills a space or container:supermarket shelf-fillers 3 [mass noun] US the tobacco blend used in a cigar. filler in other Oxford dictionaries Definition of filler in the US English dictionary