(rhetoric) Deeming an assertion to be true because of the position or the authority of the person asserting it.

The authoring of a project by a team of people working in collaboration, often with a project manager to coordinate effort

The whole of such public authorities, the governmental administration in the widest sense

plural of public authority

(uncountable) The act of securing authorization rights independently from the intermediaries that utilize them and the parties to which they apply

Any authority which has a legal mandate to govern, administrate a part or aspect of public life, such as all branches of the executive power of a state, province, municipality etc.

Right or permission authorized verbally rather than in writing.

(of a person, institution, or written work) The quality or characteristic of being respected for having good character or knowledge, especially as a source of guidance or an exemplar of proper conduct.

(computing) Software that can combine text with other multimedia to make an integrated package.

(computing) An organization that issues digital certificates for use by other parties.