Definition: The word "halley" comes from Greek and literally translates to "hollow." It's related to a comet, named after a comet in its orbit that was known as Halley's Comet until 1930, when it no longer occurred. Definition: The term "halley" is used metaphorically to refer to the concept of perfection or holiness. When applied to an individual, it suggests an extraordinary level of moral conduct and character traits, often associated with God's desire for perfectness or a divine purpose. The phrase was widely used in the Bible, particularly in the New Testament, where it frequently refers to the divine commandment of loving one another as Jesus taught about the importance of holiness.