a supply of something that is much greater than can be sold or is needed or wanted

The fall in demand for coffee could cause a glut on/in the market. 咖啡需求减少会导致市场供应过剩。

The current glut of graduates means that many of them will not be able to find jobs. 现在大学毕业生人数过多，这就意味着他们当中许多人无法找到工作。

Compare: surfeit