centennial /sɛnˈtɛnɪəl/adjective 3noun 1forms 1 adjective3 •Relating to, or associated with, the commemoration of an event that happened a hundred years before. •Happening once in a hundred years. •Lasting or aged a hundred years.In her grand villa, half-way up the hill, / O'erlooking Florence, but retired and still; / With iron gates, that opened through long lines / Of sacred ilex and centennial pines, […] — 1863 noun1 •The hundredth anniversary of an event or happening. formscentennials
