(1):
(v. i.) To kiss one another; to kiss.
(2):
(v. i.) To touch closely. See Osculation, 2.
(3):
(v. i.) To have characters in common with two genera or families, so as to form a connecting link between them; to interosculate. See Osculant.
(4):
(v. t.) To kiss.
(5):
(v. t.) To touch closely, so as to have a common curvature at the point of contact. See Osculation, 2.