al·lar·gan·do 
(ä′lär-gändō)
(ä′lär-gändō)adv. & adj.
Music
Music
In a gradually broadening style and slowing tempo. Used chiefly as a direction.
[Italian, present participle of allargare, to broaden : al-, to (from Latin ad-; see AD-) + largare, to broaden (from largo, broad, from Latin largus).]