orbital is a region of space around the nucleus where the probability of finding an electron is maximum and represents three dimensional motion of electron around nucleus. Also orbitals have different shapes where as orbit is circular in shape. an orbit is a trajectory with well defined position and momentum at all points and time. Classical orbit is pretty easy to visualize, the Earth orbits the sun. An orbital is quantum mechanical. Electrons posses wave properties and an orbital is the standing wave of a bound electron.
