- (tanque [táŋke] 'tank' < Portuguese tanque < tancar, from a Western Iberian dialect)Carlisle: 1873. A pond or a reservoir for collecting and storing rainwater, often one dug out of the earth. This southwestern usage of the term probably comes from the Spanish tanque, which Santamaría indicates is a synonym for estanque 'tank or water deposit.'
Cowboy Talk. A Dictionary of Spanish Terms. Robert N. Smead. 2013.