根据句中她“兴趣广”这一上文和被修饰的reader一词，可大概判断omnivorous具有“兴趣广、什么书都喜欢读”等含义。

She has a wide interest and is an omnivorous reader.

youdao

广坊蹬漳读使我受益匪浅。

I have benefited a lot from reading.

youdao

the whole section of the essay in which he's talking about classicism and which he later calls "tradition" is meant to suggest that we really can't merge horizons effectively unless we have a very broad and extensive common ground with what we're reading.

他花了一整个部分来讨论古典主义,他后来称其为，“传统“，是想要暗示,我们不可能有效地合并视界,除非我们对于我们的所读,有着极广的认识。

耶鲁公开课 - 文学理论导论课程节选