《機械》an engine; a machine; 《組織，施設》an organ; an organization; an institution; facilities.
機関士 an engineer; 〔英〕an engine driver.
機関紙［誌］ an ([a] house) organ.
機関室 an engine room.
機関投資家 an institutional investor ((金融機関，投資信託など)).
立法［執行］機関 a legislative [an executive] organization.
金融［交通］機関 monetary [traffic] facilities; facilities for banking [travel].
公共［教育］機関 a public [an educational] institution.