Submitted by György Chityil ... on Sat, 01/20/2018 - 01:15 Hierarchy: NounDescription: A filter {{gloss|subset of a poset}} that is maximal as a set with respect to the definition of {{term||filter}}.Ngram: ultrafilterNgram Text: ultrafilterSource: WiktionaryIssue: 0Wiktionary tag: glosstermfilterNgram Count: 1