Stand up or offer resistance to somebody or something (verb)
WordNet. Princeton University. 2010.
Use "stand firm" in a sentence
"I am told here that the Fulton Co. conference will go for you which with the votes of them from Adams will give you six votes on the first ballot and if those six will stand firm through a few ballots I believe that you will get enough from Bedford or Juniata to nominate you."
"They were hired guns, kept in the dark, never sure whether to stand firm in their orders or risk losing their jobs by mule-headedly ignoring some obvious crisis."
"Benjamin Warfield, a conservative Protestant theologian in the late nineteenth and early twentieth century, was well aware of the need for believers to stand firm in the eternal truths of their faith, despite great social and scientific upheavals."