An organized group, such as a board, committee, or deliberative assembly, has a presiding officer who may also go by the titles of chairman, chairwoman, or chair.
The official, who is normally chosen or nominated by the group's members, preside over meetings and manages the group's affairs in a professional manner. The chairman may also be referred to as the president in some organizations (or other title) The two names are used for different roles in other instances where a board appoints a president (or another title). Additionally, the term "chairman" can be employed in a way that doesn't clearly imply the holder's gender.
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