I. ˈkȯzˌwā noun
Etymology: alteration of Middle English cauciwey, from cauci, cause causey + wey way — more at way
1. : a way of access or raised road typically across marshland or water
for access to the mainland they depended on a causeway , flooded at high tide — F.M.Stenton
2. : causey ; especially : a paved or corduroy highway
the Roman causeways of early Britain
II. transitive verb
( -ed/-ing/-s )
1. : to pave with cobblestones or pebbles
the causewayed streets of the village
2. : to provide with a causeway : make a causeway through or over
a causewayed swamp