perdurantism \per*dur"ant*ism\ (p[~e]r*d[=u]r"ant*[i^]z'm), n.
(Philosophy)
The philosophical view considering the fundamental objects of
the real world as extended in the direction of time, so that
the objects themselves do not change, though temporal parts
may have different properties. Contrasted to {endurantism}, a
view considering objects to be wholly present at each instant
of time.
[PJC]