Dictionary notation is a system of symbols used to represent words and phrases in dictionaries. The two most common symbols used are RARE, which stands for 'RARE word, ' and SEEALSO, which stands for 'see also.' RARE indicates that the word or phrase is not commonly used, while SEEALSO indicates that the reader should look up another word or phrase for more information. Dictionary notation is an important tool for dictionary editors, as it allows them to quickly and easily indicate the usage and meaning of words and phrases.