Entry 1 sense Webster, 1913 bagful /(băg"fụl)/ · bag·ful · IPA /[ˈbæɡfʊɫ]/ 01 n. The quantity that a bag will hold; as, he ate a bagful of popcorn. 1. The quantity that a bag will hold; as, he ate a bagful of popcorn. Syn. bag.