(Britain) A man who has been knighted by the monarch but not as a member of one of the organized Orders of Chivalry; the lowest rank of knight in the British honours system.

(law) An undergraduate degree in the study of law.

(US, Canada, South Africa) A party held for a man who is about to be married, normally attended only by male friends and relatives.

A collegiate degree, usually involving three to four years of study (about 120 semester hours) in liberal arts.

A three- to four-year (about 120 credit hours) undergraduate degree, with a concentration in the sciences or scientific applications.

(dated) A simple meal that requires no cooking, such as bread and cheese.

(US) A nice, well-furnished dwelling where an unmarried man lives, usually by himself, but sometimes with other men.

plural of bachelor pad

(obsolete or historical) A place where unmarried men live.

A thesis for bachelor's degree.