River in S central Europe, tributary of the Danube. Rising in the Swiss Alps, it flows 507 km/317 mi NE through Austria and into Bavaria, Germany, where it meets the Danube at Passau.

ETYM AS. in, inn, house, chamber, inn, from AS. in in; akin to Icel. inni house. Related to In.
(Homonym: in).
A hotel providing both lodging and meals.

To put up at an inn