Also found in: Acronyms, Encyclopedia, Wikipedia.
A river of northern France rising in the Argonne Forest and flowing about 265 km (165 mi) northwest and west to the Oise River. Four major World War I battles were fought along its banks, including the final defeat of the Germans by French and American troops in September-October 1918.
Aisne(eɪn; French ɛn)
1. (Placename) a department of NE France, in Picardy region. Capital: Laon. Pop: 535 326 (2003 est). Area: 7428 sq km (2897 sq miles)
2. (Placename) a river in N France, rising in the Argonne Forest and flowing northwest and west to the River Oise: scene of a major Allied offensive in 1918 which turned the tide finally against Germany in World War I. Length: 282 km (175 miles)
a river in N France, flowing NW and W to the Oise. 175 mi. (280 km) long.