Poi ‧ rot, Her ‧ cule /ˈpwɑːrəʊ $ pwɑːˈrəʊ, ˈeəkjuːl $ eərˈkjuːl/ BrE AmE
a character in books by Agatha Christie. He is a clever Belgian ↑ detective , who always discovers who the criminal is by using the ‘little grey cells’ (=his brain) . Poirot is a small man whose appearance is very neat, and who has a ↑ moustache . There is a popular British television programme based on stories about Poirot.