noun. an optical aberration resulting in a distorted image.
noun. ['ˌæbɝˈeɪʃən'] a state or condition markedly different from the norm.
noun. ['ˌæbɝˈeɪʃən'] a disorder in one's mental state.
noun. ['ˌæbɝˈeɪʃən'] an optical phenomenon resulting from the failure of a lens or mirror to produce a good image.
adjective. ['sˈfɛrɪkəl'] having the shape of a sphere or ball.