The term "de" is a preposition commonly used in several languages, including Spanish and French. In these languages, it often indicates possession, origin, or a relationship between nouns. For example, in Spanish, "el libro de Juan" translates to "Juan's book," showing ownership. In French, "de" can also mean "of" or "from." It is frequently used in phrases like "le livre de Marie," meaning "the book of Marie." Understanding the context in which "de" is used is essential for grasping its meaning in sentences.