The definition of a mini slit is a small opening or cut in a material. It is usually created by using a sharp blade, such as a knife or scissors, to cut a small slit in the material. Mini slits can be used for a variety of purposes, including decorative, functional, and structural. Decorative mini slits can be used to create interesting patterns or designs in fabric, paper, or other materials. Functional mini slits can be used to allow air or water to pass through, or to create a space for a zipper or other fastener. Structural mini slits can be used to create a stronger bond between two pieces of material, or to allow for a greater range of movement. Mini slits can also be used to create a more aesthetically pleasing appearance, as they can be used to create interesting shapes or patterns.