A more thorough explanation:

Definition: The first issue of securities of a particular type or series.

Example: A company decides to issue its first set of bonds to raise capital. This is the original issue of bonds for that company.

This definition refers to the first time a company or organization offers a particular type of security, such as stocks or bonds, to the public. It is the initial sale of these securities and is often done to raise funds for the company. The example illustrates this by showing how a company's first bond issue is considered the original issue of that type of security for that company.