/spays"tuym"/ , n.
1. Also called space-time continuum . the four-dimensional continuum, having three spatial coordinates and one temporal coordinate, in which all physical quantities may be located.
2. the physical reality that exists within this four-dimensional continuum.
adj.
3. of, pertaining to, or noting a system with three spatial coordinates and one temporal coordinate.
4. noting, pertaining to, or involving both space and time: a space-time problem.
[ 1910-15 ]