Definitions for "Triple bond"
a covalent bond in which three pairs of electrons are shared between two atoms
A double bond is formed when a pi bond is superimposed on a single bond; adding a second pi bond results in a triple bond. The two pi bonds have perpendicular nodal planes, and their sum has roughly cylindrical symmetry, permitting rotation in much the same manner as a single bond.
triple covalent bond: covalent bond in which three pairs of electrons are shared by two atoms.