Answer:
Oversubscribed is a term used for when the demand for a new issue of securities, such as an IPO's shares, is greater than the number of securities offered. When a new issue is oversubscribed, underwriters or other financial entities offering the security can adjust the price upward or offer more securities to reflect the higher-than-anticipated demand.
Oversubscribed can be contrasted with an undersubscribed issue, where demand cannot fully meet the available supply.