Does "stream enterer" simply mean "devout Buddhist"?

I have read about technicalities of stream entry, but just wanted to ask, to see if I understand the "big picture": If we step outside and try to describe it in plain English, is a "stream enterer" simply a "devout Buddhist"? Let me offer an analogy with a more typical use of this word: a devout Catholic is a person who practices Catholicism not because of his upbringing/pressure from the society/habits of following the rituals/suspicion that God may exist, but because he **knows** that this is the right thing to do, and he **knows** that God exists (perhaps because of some experience that completely conviced him and left no doubt). So, is a stream enterer, analogously, somebody who **knows** that suffering is the problem, and **knows** that the Buddhist path is the solution (etc.)? I'm only asking about the concept, and I don't want to get into discussion whether things that a devout of a particular religion knows are may be true or not.