Literally bed-keeper or chamberlain, and not necessarily in all cases one who was mutilated, although the practice of employing such mutilated persons in Oriental courts was common (2 Kings 9:32; Esther 2:3). The law of Moses excluded them from the congregation (Deuteronomy 23:1). They were common also among the Greeks and Romans. It is said that even to-day there are some in Rome who are employed in singing soprano in the Sistine Chapel. Three classes of eunuchs are mentioned in Matthew 19:12.

Noah Webster's New International Dictionary of the English Language

1. (n.) A male of the human species castrated; commonly, one of a class of such persons, in Oriental countries, having charge of the women's apartments. Some of them, in former times, gained high official rank.

2. (v. t.) Alt. of Eunuchate.