port ‧ man ‧ teau /pɔːtˈmæntəʊ $ pɔːrtˈmæntoʊ/ BrE AmE noun ( plural portmanteaus or portmanteaux /-təʊz $ -toʊz/) [countable] old-fashioned
[ Date: 1500-1600 ; Language: French ; Origin: porter ( ⇨ ↑ portage ) + manteau 'cloak' ]
a very large ↑ suitcase that opens into two parts