"Long" is an adjective that describes something that has a great distance from one end to the other. It can refer to physical dimensions, such as a long road or long piece of string, indicating that the object extends significantly in length. It can also describe time, as in a long wait or long journey, suggesting that the duration is extended. In addition to its literal meaning, "long" can also convey a sense of desire or yearning. For example, one might say they have a longing for home, indicating a deep emotional wish to return. This usage highlights the word's versatility in both physical and emotional contexts.