The term "bachelor" has two possible meanings.
1) A bachelor is an unmarried man, often used to describe a person who has never been married or is not currently in a committed relationship. This usage of the term can also refer to a man who leads a carefree and sociable life, without the responsibilities of marriage or family life.
2) In some academic institutions, particularly in North America, "bachelor" refers to an undergraduate degree awarded to someone who has completed a program of study in a particular field. This usage of the term typically indicates that the person holds a four-year college degree and is qualified for certain entry-level jobs or for pursuing advanced degrees.