From Longman Dictionary of Contemporary Englishretrieverre‧triev‧er /rɪˈtriːvə $ -ər/ noun [countable] 
HBADLOa type of dog that can be trained to find and bring back birds that its owner has shot
HBADLOa type of dog that can be trained to find and bring back birds that its owner has shotExamples from the Corpus
retriever• The spooky goings-on happened when night watchman James Durham spotted a man with a heavy overcoat walking his black retriever.• Twenty years later, he got a golden retriever and named her Allie.• Of course, a well-trained Labrador made a good retriever.• At this scale, a single ethanol molecule is roughly the size of a corpulent Labrador retriever.• Others walked the retrievers, using spring-driven leashes.• This retriever is walking to heel.• And, accordingly, the two retrievers trained by De Cagny for the film came from an animal rescue program.• Some breeds show a much greater desire to enter water than others, with retrievers tending to be especially keen. 