Aberration is defined as a departure from what is normal, expected, or typical. It refers to a deviation or anomaly from the usual course or pattern.

Interesting fact: In the field of optics, aberration refers to the distortion or imperfection in the image formed by a lens or mirror. This can result in blurred or distorted images, and scientists and engineers work to minimize aberrations in optical systems to achieve clearer and more accurate visual representations.