An organisation charged by the governing body of a country or region with the provision of postal services within that region.

(aviation) The degree of control that the ailerons can exert over the rolling motion of an aircraft; related to aileron design and airspeed.

(aviation) The degree of control that the elevators can exert over the pitching motion of an aircraft; related to elevator design and airspeed.

(aviation) The degree of control that the rudder can exert over the yawing motion of an aircraft; related to rudder design and airspeed.

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.

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

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.

plural of public authority

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