WordNet sense 1 (having the shape of a sphere or ball):

globular, orbicular, spherical, globose, ball-shaped, spheric

WordNet sense 2 (having a circular shape):

circular, round

WordNet sense 3 (involving the entire earth; not limited or provincial in scope):

planetary, world, worldwide

WordNet sense 4 (concerning or belonging to all or at least two or more nations):

international