public as in affecting the people or community as a whole
"the public welfare"
public as in people in general considered as a whole
"he is a hero in the eyes of the public"
populace people in general considered as a whole
worldinvolving the entire earth; everything that exists anywhere; people in general; all of your experiences that determine how things appear to you; the 3rd planet from the sun; people in general considered as a whole; a part of the earth that can be considered separately; the concerns of this life as distinguished from heaven and the afterlife; all of the living human inhabitants of the earth
public as in a body of people sharing some common interest