portmanteau portmanteau /pɔːrtˈmæntoʊ/

noun

1. A large travelling bag made of stiff leather  ( Gladstone , Gladstone bag , portmanteau )
   a large travelling bag made of stiff leather
   
   
2. A new word formed by joining two others and combining their meanings  ( blend , portmanteau , portmanteau word )
   a new word formed by joining two others and combining their meanings
    Smog' is a blend of smoke' and fog'
   smog' is a blend of smoke' and fog'
    Motel' is a portmanteau word made by combining motor' and hotel'
   motel' is a portmanteau word made by combining motor' and hotel'
    Brunch' is a well-known portmanteau
   brunch' is a well-known portmanteau