/ Dictionary / Index P paterfamilias: Meaning and Definition of Find definitions for: pa•ter•fa•mil•i•as Pronunciation: (pā"tur-fu-mil'ē-us, pä"-, pat"ur-), [key] — pl. pa•ter•fa•mil•i•as•es pa•tres•fa•mil•i•as the male head of a household or family, usually the father. the head of the Roman family; a juridical entity who holds the patria potestas. a person who is not under the patria potestas of another. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: paterfamilias (Thesaurus) pater paternal Related Content Daily Word Quiz: neologism Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language