noun
leading newspaper; prestigious newspaper
Refers to a major, influential newspaper with high circulation and authority, such as a national broadsheet.
有力新聞がその疑惑を一面で報じた。
A leading newspaper reported the scandal on its front page.
主要新聞 means 'major newspaper' more neutrally, while 有力新聞 emphasizes influence and prestige.
Compound of 有力 (influential, powerful) and 新聞 (newspaper).