hawaii to be curved just like the inner area of a sphere.
A surface or construction configured this kind of a curve: "an amazing concavity of white sand lined with hand . . . trees” ( Isles).
hawaii to be concave
A concave construction or area
A concave surface, or perhaps the room bounded because of it; the state of being concave.
their state to be concave; hollowness.
A concave surface, or the area within it; the interior surface of a hollow curved human body, or even the area within these types of human anatomy; any hollow space which will be more or less spherical.