Company culture is the sum of how individuals in a company interact and collaborate; with each other and the organization.
Culture, in a societal sense, is a group's cumulative knowledge and achievements displayed via behavior, art, music, food, religion, and language. Company culture is comparable in that it establishes the framework for a society's values and ideas. It is a collection of views, values, attitudes, standards, goals, and actions that everyone shares.
It is how you as a person identifies with the organization. "What does working here say about me??"
An organization's culture is like a collection of miniature societies within a larger civilization, and its cultures are expressions of the job they do, the values they hold, and the collective behaviors of its employees.