There are multiple definitions:

1. ubiquitin-binding domain(English)

   • UAF1, UBZ, UFB, UIM, ULD, USP1
   • Molecular biology
   • https://doi.org…101.2014.956475

2. uitbetaalde bedragen aan derden(Dutch)

   • CBO
   • Financial issues
   • https://www.bel…gen_aan_derden/