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A phenomenon (plural : phenomena) is an occurrence, a circumstance, or a fact that is perceptible by the senses; an unusual, significant, or unaccountable fact or occurrence; something which appears real to the mind, regardless of whether its underlying existence is proved or its nature understood; or the appearance of an object to the mind as opposed to its existence in and of itself, independent of the mind (Kant); in physics, an observable event. (7)
© Copyright 1997 Pacific Neuropsychiatric Institute.