- a river in S central South America, rising in W central Bolivia and flowing southeast, forming the border between Argentina and Paraguay, to the Paraguay River at Asunción. Length: about 1600 km (1000 miles)
WordReference Random House Unabridged Dictionary of American English © 2026
Pil•co•ma•yo
(pēl′kô mä′yô),USA pronunciation n.
- Place Namesa river in S central South America, flowing SE from S Bolivia along the boundary between Paraguay and Argentina to the Paraguay River at Asunción. 1000 mi. (1610 km) long.
Collins Concise English Dictionary © HarperCollins Publishers::
Pilcomayo /Spanish: pilkoˈmajo/ n