What is "frame level"

Frame \Frame\, n.

1. Anything composed of parts fitted and united together; a fabric; a structure; esp., the constructional system, whether of timber or metal, that gives to a building, vessel, etc., its model and strength; the skeleton of a structure.

   These are thy glorious works, Parent of good, Almighty! thine this universal frame.
   --Milton.

2. The bodily structure; physical constitution; make or build of a person.

   Some bloody passion shakes your very frame.
   --Shak.

   No frames could be strong enough to endure it.
   --Prescott.

3. A kind of open case or structure made for admitting, inclosing, or supporting things, as that which incloses or contains a window, door, picture, etc.; that on which anything is held or stretched; as:

   1. The skeleton structure which supports the boiler and machinery of a locomotive upon its wheels.

   2. (Founding) A molding box or flask, which being filled with sand serves as a mold for castings.

   3. The ribs and stretchers of an umbrella or other structure with a fabric covering.

   4. A structure of four bars, adjustable in size, on which cloth, etc., is stretched for quilting, embroidery, etc.

   5. (Hort.) A glazed portable structure for protecting young plants from frost.

   6. (Print.) A stand to support the type cases for use by the compositor. (f) a pair of glasses without the lenses; that part of a pair of glasses that excludes the lenses.

4. (Mach.) A term applied, especially in England, to certain machines built upon or within framework; as, a stocking frame; lace frame; spinning frame, etc.

5. Form; shape; proportion; scheme; structure; constitution; system; as, a frameof government.

   She that hath a heart of that fine frame To pay this debt of love but to a brother.
   --Shak.

   Put your discourse into some frame.
   --Shak.

6. Particular state or disposition, as of the mind; humor; temper; mood; as, to be always in a happy frame. Same as {frame of mind}

7. Contrivance; the act of devising or scheming. [Obs.]

   John the bastard Whose spirits toil in frame of villainies.
   --Shak.

8. In games:

   1. In pool, the triangular form used in setting up the balls; also, the balls as set up, or the round of playing required to pocket them all; as, to play six frames in a game of 50 points.

   2. In bowling, as in tenpins, one of the several innings forming a game.

      Balloon frame, Cant frames, etc. See under Balloon, Cant, etc.

      Frame building or Frame house, a building of which the form and support is made of framed timbers. [U.S.] -- Frame level, a mason's level.

      Frame saw, a thin saw stretched in a frame to give it rigidity.