Alto relievo and Relievo

Alto relievo noun - A sculptural relief in which forms extend out from the background to at least half their depth.

Relievo and alto relievo are semantically related. In some cases you can use "Relievo" instead a noun phrase "Alto relievo".

Relievo noun - Sculpture consisting of shapes carved on a surface so as to stand out from the surrounding background.

Alto relievo and relievo are semantically related. Sometimes you can replace phrase "Alto relievo" with "Relievo", this terms are similar.