river in N France, flowing into the Oise: 175 mi (282 km)
See Aisne in American Heritage Dictionary 4
(ān)
A river of northern France rising in the Argonne Forest and flowing about 266 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.