noun
metro
MEHT-roh
noun
1
An underground or urban rapid-transit railway system, or a train belonging to one.
"We took the metro to get across the city quickly."
2
A large metropolitan area.
"The company relocated to the Boston metro area."
How to Use Metro
Learner’s notesIn plain EnglishA city's subway/underground train system, or the wider urban area around a city.
Common pairings
take the metro
metro station
metro area
Word Forms
more metro comparative, metros plural, metros plural, most metro superlative
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Etymology
From French métro, a clipping of métropolitain, originally referring to the Paris subway system — itself named after London's early "Metropolitan Railway".