Definition of invisible

The word "invisible" originates from the Old French word "invisible" or "invizibles," which meant "not apparent" or "unseen." The Old French word, in turn, can be traced back to the Latin word "invisibilis," a compound of "in" (meaning "not") and "visibilis" (meaning "seeable" or "visible"). In Old English, the concept of invisibility was expressed through the word "ungand," derived from "ungean" meaning "not-seen." However, by the Middle English period, "invisible" had begun to replace "ungand" in English texts. The use of "invisible" to describe objects or beings that cannot be seen by the human eye dates back to the late 14th century. In its earliest usage, it was primarily associated with spirits or supernatural entities that were understood to exist outside the realm of physical perception. Today, the word "invisible" continues to be used in a variety of contexts, including science, technology, and popular culture, to describe things that are not immediately apparent to the senses.