What does the idiom "Wild-goose chase" mean?

• The idiom "Wild-goose chase" means - A pursuit that is likely to be unsuccessful.• wild-goose chase (idiom)English Meaning: a search that is completely unsuccessful and a waste of time because the person or thing being searched for does not exist or is somewhere else.Bangla Meaning: অযৌক্তিক অনুসরণ।Example Sentence:- After two hours spent wandering in the snow, I realized we were on a wild goose chase.Source:1. Cambridge Dictionary.2. Accessible Dictionary by Bangla Academy.