Wa·ter·loo 1 
(wô′tər-l, wŏt′ər-, wôtər-l′, wŏtər-)
(wô′tər-l, wŏt′ər-, wôtər-l′, wŏtər-)1. A town of central Belgium near Brussels. Napoleon met his final defeat in the Battle of Waterloo (June 18, 1815).
2. A city of northeast Iowa on the Cedar River northwest of Cedar Rapids. It was founded in 1845.