Causeway \Cause"way\ (k[add]z"w[asl]), Causey \Cau"sey\ ((k[add]"z[y^]), n. [OE. cauci, cauchie, OF. cauchie, F. chauss['e]e, from LL. (via) calciata, fr calciare to make a road, either fr. L. calx lime, hence, to pave with limestone (cf. E. chalk), or from L. calceus shoe, from calx heel, hence, to shoe, pave, or wear by treading.]

A way or road raised above the natural level of the ground, serving as a dry passage over wet or marshy ground.

But that broad causeway will direct your way. --Dryden.

The other way Satan went down The causey to Hell-gate. --Milton.

Source: Webster's Revised Unabridged Dictionary (1913)