"Accident, in its widest technical sense (equivalent to
attribute) is anything
that is attributed to another, and can only he conceived as belonging to some
substance (in which sense
it is opposed to substance); in its narrower and more properly logical sense, it
is a predicable which may be present or absent, the essence of the species
remaining the same; as for a man to be 'walking,' or 'a native of Paris'" (Whately,
Logic, bk. II. ch. V. sec. 4, and index; Aristotle, Metaphys., lib.