Misspelling of in principle.

(cinematography) The phase of film production during which the film is actually shot, as distinct from pre-production and post-production.

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.

An assistant principal or deputy headteacher.

(algebra, ring theory) A commutative ring in which every ideal is a principal ideal.

(mathematics) An ultrafilter such that every set belonging to it is the superset of some fixed singleton set.

(algebra) An ideal I in an algebraic object R (which could be a ring, algebra, semigroup or lattice) that is generated by a given single element a ∈ R; the smallest ideal that contains a.

(algebra) An integral domain in which every ideal is a principal ideal.

plural of principal investigator