1 to discover secret or forgotten facts by searching very carefully -- 挖掘,搜寻(秘密或被遗忘的事)
I've been doing some research on our family history and I've dug up some interesting information. 我一直在研究我的家史,并且挖掘出了一些有趣的信息。
She's one of those reporters who's always trying to dig up dirt on (= unpleasant private details about) celebrities. 她是一贯热衷于挖掘名人隐私的记者之一。