Multifocal contact lenses are contact lenses with multiple prescriptions all in one lens. There is typically a prescription for very close objects (near): one prescription for normal objects viewed at a distance, and then prescriptions for intermediate distances.
There are two main types of multifocal contact lens designs. The most common is a set of concentric circles of lens powers prescribed for various viewing distances. There are also blended designs, which keep both the near and distance prescriptions close to the center of your eye, and mimic a natural viewing experience by correcting the specific points of aberration in your eyes.