It seems to be used in exactly the same ways as the English word partner: a person in an amorous relationship, someone with whom you are assigned to work (i.e. a school project with partners), and in the "business partner" sense.
Thankyou. I belive you are correct. That page provides enough context in it's brief examples to lead me to Lebenspartner > Lebensgefährte > https://de.wikipedia.org/wiki/Lebenspartnerschaftsgesetz.
Would "der Partner" be also used for a female partner? Is there such a word as "die Partnerin"? I know "grammatical gender" doesn't always match up with "natural gender", and for a business partner the pronoun might not matter much. But calling a female romantic interest "der Partner" sounds very very strange.
That is not a family, that's someone playing family. Husband, father, wife, mother, parents, children, son, daughter, brother, sister, grandpa, uncle, cousin, etc. these are the terms you use in a family, "partner" does not fit, that is someone you do business with. And by the way, why does duolingo do such disgusting things like showing a picture of two dudes under the word "partner" in a family section? How does this help you learn a language? By puking?!