The Merriam-Webster Dictionary defines culture shock as:
"a sense of confusion and uncertainty sometimes with feelings of anxiety that may affect people exposed to an alien culture or environment without adequate preparation"
Google Answers has this:
The feeling of disorientation experienced by someone who is suddenly subjected to an unfamiliar culture, way of life, or set of attitudes."
There are four identifiable stages to culture shock
1. The Honeymoon Stage
2. The Frustration Stage
3. The Adjustment Stage
4. The Acceptance Stage
To provide two different views, we have included both a personal and professional link.
1. This personal account explains the culture shock specifically to Ecuador. Culture Shock in Ecuador.
2. This is a professional perspective from Princeton University explaining culture shock in general. Four Common Stages of Cultural Adjustment
Note that culture shock does not necessarily mean moving from one country to another. It could very well be moving to different parts of the same country. For example, moving from Philadelphia to the central valley in California can cause culture shock.