Proboscis/prəʊˈbɑːsɪs,prəʊˈbɑːskɪs/ Definition 1 of 4Pro Tip 1/2Animal-specific Term Proboscis mostly describes noses of certain mammals, notably elephants. The baby elephant playfully twirled its proboscis. Pro Tip 2/2Not Always Literal Sometimes 'proboscis' may describe things resembling a long nose metaphorically. The hose looked like a giant proboscis reaching across the garden.