To pass or go by, usually in reference to time.

समय का गुजरना

English Usage: Three hours have elapsed since we started waiting for the train.

Hindi Usage: हमें ट्रेन का इंतजार करते हुए तीन घंटे गुजार चुके हैं।

The act or instance of passing, especially time.

बीतना

English Usage: The elapse of time during the meeting felt exceptionally long.

Hindi Usage: बैठक के दौरान समय का बीतना बेहद लंबा लग रहा था।