Culture is learned. We accumulate knowledge about experiences and information both by direct instruction and through observation.
Culture is all-encompassing, and includes all aspects of human group behavior.
Culture is shared. It is located and transmitted in groups, which unifies us by a common experience.
Culture is symbolic. We acquire information from symbols, which are verbal or nonverbal signs that have no necessary or natural connection with the things for which they stand (such as a flag, stop sigh, or corporate logo). Other primates can understand symbols, but only humans can learn, communicate, store, process and use symbols.
Culture is integrated. Any culture is a system; changes in one face of the culture will result in changes in other aspects. Core values provide an organizational logic for the rest of the culture.
Culture is both adaptive and maladaptive. Because behavior is motivated by cultural factors, not environmental constraints, sometimes our behavior can be maladaptive (for example, binge drinking on college campuses).
Culture is human. Only humans can claim to have "culture" in the truest sense of the word.