(countable) A region or sovereign nation headed by a prince or princess.

Primary; most important; first level in importance. / (obsolete, Latinism) Of or relating to a prince; princely.

(finance, uncountable) The money originally invested or loaned, on which basis interest and returns are calculated. / (Canada, US, Australia, New Zealand) The chief administrator of a school.

In a primary manner; pertaining to the principal of a matter.

plural of principal

plural of principality

Misspelling of in principle.

The quality of being principal.

Wales / Alternative letter-case form of principality; any of the actual extant principalities.

Alternative form of principlism