in carpentry: a sloping or slanting edge or surface, usu between two other surfaces meeting at right angles
the angle or slant that one surface or line makes with another when they are not at right angles
an instrument consisting of two rules or arms jointed together and opening to any angle, used for drawing angles or adjusting surfaces to be given a bevel
[Old French baïf with open mouth, from baer to yawn, from late Latin batare]