1.Written Symbol: A letter can refer to a written character or symbol used to represent the sounds of a language. Letters form the building blocks of words, and different combinations of letters create words with various meanings. For example, the word "letter" itself is composed of the letters "L," "E," "T," "T," and "R." Each letter has its own shape and pronunciation, and when combined in the correct order, they spell out the word "letter."
2.Written Message: A letter can also refer to a written communication or correspondence sent from one person or group to another. This type of letter is usually delivered through postal mail, email, or other means. It contains a message, information, or communication from the sender to the recipient. Letters can be formal, informal, friendly, or business-like, depending on the context and the relationship between the parties involved.