noun
1.
a comprehensive and fundamental rule, doctrine, or assumption
the principle of free speech
Synonyms: axiom, fundamental, law, principium, theorem
Related Word: basis, foundation, ground; canon, precept, rule; convention, form, usage
2.
principles plural
Synonyms: ethic 3
3.
principles plural
Synonyms: alphabet 2, ABC's, elements, fundamentals, grammar, rudiments