Grăd'ū-ā'tion, n.

n. [L. Lat. graduatio, Fr. graduation, Sp. graduacion, It. graduazione.]

1. The act of graduating; as, graduation of a scale, or of qualities, graduation at a college, &c.
2. The art of dividing into degrees, or other definite parts, as scales, the limbs of astronomical and other instruments, and the like.
3. The marks or lines made on an instrument to indicate degrees or other divisions.
4. The exposure of a liquid in large surfaces to the air, so as to hasten its evaporation.