Brassey, Thomas Syllabification: (Bras·sey, Thomas)Pronunciation: /ˈbrasē/Definition of Brassey, Thomas (1805–70), English engineer and railroad contractor. He built more than 6,500 miles (10,000 km) of railroads in Europe, India, South America, and Australia. Brassey, Thomas in other Oxford dictionaries Definition of Brassey, Thomas in the British & World English dictionary