From Longman Dictionary of Contemporary Englishprincipalprin‧ci‧pal1 /ˈprɪnsəpəl/ ●●○W2AWL adjective [only before noun] 🔊 🔊 MAINmost important syn main 🔊 His principal reason for making the journey was to visit his family. 🔊 Teaching is her principal source of income. 🔊 the principal character in the book► see thesaurus at important, main →principally
principalprincipal2 ●●○ noun 🔊 🔊 1school [countable] American EnglishSE someone who is in charge of a school syn headteacher British English 🔊 a small school with just three teachers and the principal► see thesaurus at teacher2university/collegeSE [countable] British English someone who is in charge of a university or college3business [countable] American English the main person in a business or organization, who can make important business decisions and is legally responsible for them 🔊 The principal of the business has an office in New York.4performer [countable]AP the main performer in a play or in a group of musicians, dancers etc 🔊 She later became a principal with the Royal Ballet.5money [singular] technicalBFMONEY the original amount of money that is lent to someone, not including any of the interest
Examples from the Corpus
principal• Insuredbondscarry a pledge from a privatebacker to pay interest and principal on the bonds if the issuer defaults.• Another teacher who moved me was an assistantprincipal named Cho, who doubled as a history teacher.• His comments on Paul Caton, the deputyprincipal, were gratuitously offensive.• Each son has a career in education -- three teachers and one principal.• MajorJack Tilley warmed up the troops much in the fashion of a jovial high school principalpreparingstudents for graduation.• Once, after he had been absent a fortnight, the principaltackled his parents.• In the course of acting for each of their principals, estateagents will acquire information confidential to that principal.• The government will also receive inflation-adjusted 12 percent interest on the unpaid principal.From Longman Business Dictionaryprincipalprin‧ci‧pal1 /ˈprɪnsəpəl/ noun1[singular]FINANCE the original amount of a loan, not including any of the interest that is paidThe loan amounts outstanding totaled about $32.2 million in principal and $2.2 million in interest.No principal is due for repayment until next year.2[countable] an important person, manager etc in some types of organization, who may be legally responsible for its actionsMr O'Brien is a principal of the Law and Economics Consulting Group.3[countable]LAW the actualbuyer and the seller in a business deal, rather than the people who represent them, or BROKERs who buy and sell for themNone of the principals would comment on the purchase price.principalprincipal2 adjective1most important SYN MAINPortland is one of the principal unloading points for Japanese automobiles.Gulf’s strategy of concentrating on its principal business of oil and gas productionAs principal shareholders in the company, no one has a greater interest in its management.Baxter Healthcare is the principal subsidiary of Baxter International Inc. (=the largest company owned by them).Teaching is her primary source of income.the country’s principal trading partner2FINANCErelating to the original amount of a loan, rather than any interestThe total principal amount of debentures being sold was increased to $75 million.A new government may be unwilling to repay interest on the principal sum loaned.