1. a large travelling bag made of stiff leather

    Synonym: GladstoneGladstone bag

2. a new word formed by joining two others and combining their meanings

    e.g. `smog' is a blend of `smoke' and `fog'
           `motel' is a portmanteau word made by combining `motor' and `hotel'
           `brunch' is a well-known portmanteau

    Synonym: blendportmanteau word