A CHAIR is a piece of furniture that is used for sitting. It typically has four legs and a backrest, and is often made of wood or metal. The term 'CHAIR' can also be used to refer to a person who is in charge of a meeting or organization, such as the CHAIR of a board of directors. This usage of the word comes from the Latin word 'cathedra, ' which means 'SEAT.' The crossword solution 'LEAD' is a verb meaning to take charge of something, and is related to the term 'CHAIR' in this sense.