For millions of its members, national culture is a shared reality, a meaning creator, and a sensemaker that shapes their everyday life experience. Although sensemaking is a core aspect of many prominent theories on culture, the empirical research on this macro-social process is still fragmented and rare. In the current research, I aim to fill this gap by investigating the effects of cultural dimensions (e.g., autonomy vs. embeddedness, uncertainty-avoidance) on the sensemaking process, as it is reflected in the activities of an organization aiming at being the largest, the most reliable, and the most comprehensive encyclopedia in the world – Wikipedia. Based on the multinational data from 35 countries, I hypothesized and found that the autonomy-embeddedness cultural dimension was positively associated with all aspects of sensemaking, indicating that freedom is essential for the sensemaking process. Furthermore, breaking down the sensemaking process into the sense (i.e., the end state meaning of a phenomena) and making (i.e., the process of meaning creation) components revealed that when controlling for making, uncertainty-avoidance had a unique negative effect on sense, and when controlling for sense, it had a unique positive effect on making. These results indicate that compared to cultures that have high tolerance for ambiguity, cultures that have low tolerance for ambiguity invest more effort and resources in the process of creating a shared reality that sometimes occurs at the expense of the end state product – the meaning of the shared reality. Other cultural dimensions were unrelated to the sensemaking process.