What is the meaning of Secretary?

Someone entrusted with a secret; a confidant.

Someone employed as a scribe for personal correspondence.

A person who keeps records, takes notes and handles general clerical work.

The head of a department of government.

A managerial or leading position in certain non-profit organizations, such as political parties, trade unions, international organizations.

A type of desk, secretary desk; a secretaire.

A secretary bird, a bird of the species Sagittarius serpentarius.

To serve as a secretary of.

Source: wiktionary.org