The definition of a Basic Security (BS) is a type of security that provides the most basic level of protection for investors. It is a security that is issued by a company and traded on a public stock exchange. The main purpose of a BS is to provide a company with the ability to raise capital for its operations. The BS is a type of debt security, meaning that the company must pay back the principal amount of the security plus interest over a specified period of time. The BS also provides investors with the right to vote on certain matters, such as the election of directors or other corporate decisions. The BS is a relatively low-risk investment, as it is backed by the company’s assets and is generally considered to be less volatile than other types of securities.