A dictionary listing is a collection of words and their definitions. It is typically organized alphabetically, with each word and its definition listed in order. The term 'usages' refers to the different ways a word can be used in a sentence. This includes the various forms of a word, such as its noun, verb, or adjective form, as well as any other variations of the word. Usages are often included in dictionary listings to provide more context for the word's meaning.