1 (wiktionary) 2 (de.wikipedia) 3 (en.wikipedia) 4 (glosbe)

Verbs Nouns Adjectives/Adverbs Pronouns Prepositions Conjunctions
principal (Advanced search)

NGSL3000 principal Being of the most importance adj
SAT5000 principal Most important. adj.
SAT5000 principality The territory of a reigning prince. n.

Tanaka6000 principal

principal {adj} (primary, main) principal {n} (the principal administrator of a school) principality {n} (region) Principality of Albania {prop} (monarchy in Albania from 1914 to 1925) principal photography {n} (phase of film production during which the film is actually shot)

He has just become a principal .
Among those present was our principal .