Definitions

1. proper noun

A province in the Philippines, located on the northeastern part of Luzon.

“The Cagayan Valley is one of the major rice-producing regions in the country.”

2. noun

A river in the Philippines, the longest river in Luzon, flowing through the Cagayan Valley.

“The Cagayan River is known for its rich biodiversity and is home to several species of fish and other aquatic life.”