In the context of Urban Dictionary, "definitions" include not only literal definitions, but also descriptions. As such, "to define" a word or phrase on Urban Dictionary does not necessarily entail providing a strict definition; merely a description of some aspect of the word or phrase could suffice for inclusion in the dictionary.
Urban Dictionary as a dictionary of slang, or cultural words or phrases, not typically found in standard dictionaries. Words or phrases on Urban Dictionary may have multiple definitions and usage examples.