What does it mean to own a share of stock in a company?

means you are buying a unit of the company therefore making you a partner to the company.

Explanation:

A stock is a type of investment that represents an ownership share in a company.

A stock is an investment. When you purchase a company's stock, you're purchasing a small piece of that company, called a share. Investors purchase stocks in companies they think will go up in value.

When you buy shares, you're buying a share of the company's assets and its profits. In fact (and in law), you're a part owner of the company.

Buying a share of stock of a company simply means you are buying a unit of the company. Investors are able to buy the stocks of the company once the company share is launched in the market.