the most important or senior person in an organization or group

a design consultancy whose principal is based in San Francisco

a sum of money lent or invested, on which interest is paid

the winners are paid from the interest without even touching the principal

a person for whom another acts as an agent or representative

stockbrokers in Tokyo act as agents rather than as principals

the person directly responsible for a crime

a main rafter supporting purlins

an organ stop sounding a main register of open flue pipes typically an octave above the diapason

all the principals are on one manual