The American Heritage® Dictionary of the English Language: Fourth Edition. 2000.
public relations
PLURAL NOUN:
abbr.PR1.(used with a sing. verb) The art or science of establishing and promoting a favorable relationship with the public. 2.(used with a pl. verb) The methods and activities employed to establish and promote a favorable relationship with the public. 3.(used with a sing. or pl. verb) The degree of success obtained in achieving a favorable relationship with the public.