Microsoft does not maintain a public archive of every single old definition version (1.55.1119.0 would be from many years ago, likely around 2016–2018). The official download links from Microsoft always provide the latest definitions, not historical ones.
Here's the direct information you need:
I understand you're looking for a specific older version of the Windows Defender definition update: , definition version 1.55.1119.0 . Microsoft does not maintain a public archive of