Saint Nicholas \Saint Nicholas\, St Nicholas \St. Nicholas\, n. A Dutch saint, who was reputed to bring gifts to children on Christmas even, giving rise to the modern legend of {Santa Claus}. [PJC] {A Visit from St. Nicholas} The original name for a poem by Clement Clarke Moore, popularly called titled {The Night Before Christmans}. It is a popular poem with the theme of St. Nicholas (Santa Claus) coming to bring gifts to children on Christmans eve. See {Night Before Christmas} in the vocabulary. [PJC]