Good moorning,
Since this is not the System Default template I cannot guarantee I've follow the correct order. Here is the process:
1. I've converted the txt files to csv resulting in this format:

- When I tried to upload it to Purview it gives me this warning

- Following the importation it creates this:

- The first one has the definition I'm looking for:

2. If I try to put all the information in the same row in order to only create one term it gives me the following error:
(Some semicolon are deleted from the txt because, as you see in the previous images they appear in the name or definition so I suppose these are not relevant, anyways, putting this semi colon drives me to the same error)


3. I tried another thing
- First I create a term manually with the System default template

- I export this term in order to see the template

If I tried to recreate this exact same file or to change something in this same template and upload it again it gaves me a bunch of different errors such
"Unable to parse the file [...]"
or this one:

Thank you
Sergio