Here is a quote from John Riches in The Bible: A Very Short Introduction, which I think is instructive for those who throw the term Bible around:
So, to put it simply, the term ‘Bible’, as a collection of sacred texts, is first used for the Christian scriptures, in their different versions. Only later is it used of Jewish scriptures in a manner which is designed to distinguish the Hebrew from the Christian scriptures. Thus the Bible, in most recent usage, is ambiguous: it may refer either to the Jewish or the Christian Bibles, in their various forms.
I’ve always used and understood the Bible to refer to the Christian Scriptures, while using “Hebrew Scriptures” or Tanakh for the other.
That works okay, except that Christian Scriptures vary among Catholic, Orthodox, and Protestants. So, the term is still somewhat ambiguous, at least in my mind.