Elliptical galaxy is one of the three types of galaxies, the others being spiral galaxy like our milky way, and irregular galaxy. They are the most abundant type of galaxies.
Elliptical galaxy is ellipsoidal in shape like an egg and rotates radially different from spiral galaxies, such as the milky way which rotates around a fixed center.
These type of galaxies are low on gas clouds and dust, thus lack star formations, and contains a lot of old aged stars.