Lemon is a common fruit with a yellow-green appearance and a small head, which is usually used to make drinks, condiments, jams and so on. Not only the taste is refreshing, but also rich in vitamin C and antioxidants, which is also helpful for health care. In addition, in some literary works, lemon is often quoted as a symbol. For example, in the novel The Outsider by the French writer Camus, lemon is endowed with mysterious and philosophical significance.

Lemon also has the translation of "sour lemon", which is often used to describe "bittersweet" or "speechless and helpless" in network language. In addition, militarily, lemon has another meaning, that is, "the main goal or important task of an operation", such as "in this operation, destroying an important stronghold is our lemon"

In addition to the above meanings, lemon is also used to mean "instant noodles" in online language, mainly because some brands introduce instant noodles with lemon flavor. So when you see someone writing "What does lemon mean?" Sometimes, ask about instant noodles. But this usage is not very common, and it is only popular among certain friends or groups.