A corporation refers to a group of people who register themselves with the relevant law enforcement agencies as belonging to a single entity. A corporation can be owned by shareholders but their liability is limited to their individual investments. Corporations as a legal entity have rights and responsibilities like natural people do. So, yes, you can loan or borrow money from a corporation and even sue it.
For example…
McDonalds is a large, global corporation. It started off as a single hamburger restaurant in 1955 and under the guidance of its owner Ray Kroc, expanded as he granted franchises to other entrepreneurs. In 1965, when there were over 200 McDonald’s restaurants across the USA, it became a corporation.