The Collaborative International Dictionary of English v.0.48:
Cove \Cove\, v. t. [imp. & p. p. Coved (k?vd); p. pr. & vb. n.
To arch over; to build in a hollow concave form; to make in
the form of a cove.
The mosques and other buildings of the Arabians are
rounded into domes and coved roofs. --H.
Coved ceiling, a ceiling, the part of which next the wail
is constructed in a cove.
Coved vault, a vault composed of four coves meeting in a
central point, and therefore the reverse of a groined