— durational , adj.
/doo ray"sheuhn, dyoo-/ , n.
1. the length of time something continues or exists (often used with the ).
2. continuance in time.
3. (in the philosophy of Bergson) a temporal continuum, intuitively known, within which the élan vital operates.
[ 1350-1400; ME duration- (s. of duratio ), equiv. to L durat ( us ) (ptp. of durare to last; see DURE 2 ) + -ion- -ION ]