Chambers's Twentieth Century Dictionary…
“ Phenomenon, fē-nom′e-non, n. an appearance: the appearance which anything makes to our consciousness, as distinguished from what it is in itself: an observed result: a remarkable or unusual person, thing, or appearance:—pl. Phenom′ena.—adj. Phenom′enal, pertaining to a phenomenon: of the nature of a phenomenon: so strange as to excite great wonder: out of the common.—v.t. Phenom′enalise, to represent as a phenomenon.—ns. Phenom′enalism, the philosophical doctrine that the phenomenal and the real are identical—that phenomena are the only realities—also Externalism ”
