Pater/ˈpeɪtər/ Definition 1 of 2Pro Tip 1/3Archaic Usage Used mainly in historical or classical contexts; rarely in everyday conversation. In the tome, his pater's legacy was detailed. Pro Tip 2/3Literary Flair Adds a classical or formal tone to writing, suitably used in literature or formal speeches. He spoke fondly of his pater, quoting ancient maxims. Pro Tip 3/3Not Modern English Understand that 'pater' isn't commonly used in current English dialogues. Thou art my pater and guide, as the old texts say.