Orbital:
An orbital may also be called an atomic orbital. Most people think that it is a circle, but the density regions that may contain an electron may be spherical.
An orbital can be defined as the place where an electron could be.
It may refer to an electron cloud having an energy state described by numbers called quantum numbers. Every electron is described by a unique set of quantum numbers.
An orbital in simple words refers to the dimensional motion of an electron around the nucleus in a 3D motion.