An abbreviated written form of 'expressway,' a high-speed divided highway designed for fast vehicular traffic.
Mid-20th century American English abbreviation combining 'express' + 'way.' Used primarily in written contexts like maps, signs, and directions.
Expwy is a pure American artifact—it emerged when cities needed to fit highway names on road signs, so 'Interstate 95' became 'I-95' and 'expressway' became 'expwy,' creating a whole dialect of abbreviated sign-speak.
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