Or8way takes a 8bit bus as input and outputs a single bit bus. That bit is 1 if any of the bits in the input are 1, and 0 if all of the bits in the input are 0. Thus, there really is no or1out[1]. There is only or1out, a single-bit signal.
You can confirm this by looking at the definition comment for Or8Way:
/**
* 8-way Or:
* out = (in[0] or in[1] or ... or in[7])
*/