What does 一貫 mean?
一貫 is a Japanese noun meaning “consistency; coherence; integration” in English. It can also be translated as “one kan (approx. 3.75 kg), one piece of sushi” depending on context. It is written as 一貫 in kanji, いっかん in hiragana, and ikkan in romaji. This word is part of JLPT N2 vocabulary.
Example sentence
その学校は、中・高一貫校だということを頭の片隅にでも入れておいて下さい。
Bear in mind that that school is an integrated junior high and high school.