n. An obsolete form of phenomenon.n. In philosophy, an appearance or immediate object of experience, as distinguished from a thing in itself.n. In science, a fact directly observed, being eithern. an individual circumstance or occurrence, such as the emergence of a temporary star, or more usuallyn. a regular kind of fact observed on certain kinds of occasion, such as the electrical sparks seen in combing the hair of some persons in cold, dry weather.n. Ay extraordinary occurrence or fact in nature; something strange and uncommon; a prodigy; a very remarkable personage or performer.n. Any physiological or pathological change apparent to the senses.n. Diminution of the Achilles tendon reflex in sciatica.