What does Bootstrap loader mean?

Bootstrap loader meaning in Computer Science Dictionary

instead described as bootstrapping, bootloader, or boot system, a bootstrap loader is a course that resides within the computer systems EPROM, ROM, or any other non-volatile memory that automatically performed because of the processor whenever switching using the pc. The bootstrap loader checks out the hard disk drives boot sector to continue the process of loading the computer systems operating-system. The expression boostrap comes from the old phrase "Pull your self up by your bootstraps."