In many ways, calling something 'humanoid' is placing it in a leftover bin. Aberrations stem from influence from beyond reality, elementals are formed from pure elemental energy, oozes are living slime, but humanoids are just what's left. They are more or less intelligent and usually able to speak a language, but they don't have to be clever. They procreate sexually in one way or another, but it might differ significantly how. They aren't even guaranteed to by humanoid in the strict meaning of having two legs, two arms, and one head attached to the trunk of their body. Some also have a tail. Some have wings. Some have wings instead of arms.
Various kinds of humanoids are often, quite erroneously, referred to as "races," despite being different species. Sometimes a "different race" is just a member of the same species that grew up under very different circumstances. Exactly where the line is drawn has much more to do with tradition and perception than genetics. And even the genetics aren't that clear. For instance, elves are only elves if they have an elven soul. Which a child they have with a human may or may not have. But if that child then has a baby with a human, the baby will not have an even soul but might have elf genes. An elf can never have offspring with an orc, but humans can have fertile offspring with either. It's complicated.