The phrase "what is the meaning of" is a common introductory question used to ask for the definition, explanation, or significance of something. It seeks to understand the sense, purpose, or interpretation of a word, phrase, concept, symbol, or any subject of inquiry. The word "of," which is integral to the phrase, is a preposition used in many ways, such as to indicate possession, origin, cause, content, relation, or belonging among others. It connects a part to a whole, shows relationships, or specifies characteristics between words and ideas.
In summary, "what is the meaning of" asks for the explanation about what something represents or signifies. For example, asking "What is the meaning of life?" seeks an understanding of life's purpose or significance. Similarly, "What is the meaning of a word?" asks for that word's definition or conceptual understanding.