centennial

adj

1. (not-comparable)Relating to, or associated with, the commemoration of an event that happened a hundred years before.

   “a centennial ode”

2. (not-comparable)Happening once in a hundred years.

   “a centennial jubilee    a centennial celebration”

3. (not-comparable)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, […]”

noun

1. The hundredth anniversary of an event or happening.

name

1. A city in Colorado.
2. A census-designated place in Wyoming.