Agnosticism,
a word used by Professor Huxley, to express the thought, that beyond what man can know by his senses, or feel by his higher affections, nothing can be known. Facts, or supposed facts, both of the lower and the higher life, are accepted, but all inferences deduced from these facts as to the existence of an unseen world, or of beings higher than man, are considered unsatisfactory, and are ignored. Agnostics, positivists, and secularists have much in common, and many people exist to whom any one of the three names might be indifferently applied.
Entry from Everybody's Cyclopedia, 1912.