1met·ro 
/ˈmɛtroʊ/ noun
plural met·ros /ˈmɛtroʊ/ noun [count] : an underground railway system in some cities : subway
▪ the Paris Metro ▪ We took the metro to the museum. = We went by metro to the museum.
▪ the Paris Metro ▪ We took the metro to the museum. = We went by metro to the museum.
