1. The
act of graduating, or the state of
being graduated; as,
graduation of a scale;
graduation at a college;
graduation in colour;
graduation by evaporation; the
graduation of a bird's tail, etc.
2. The marks on an
instrument or
vessel to
indicate degrees or quantity; a scale.
3. The
exposure of a
liquid in
big surfaces to the air, so as to hasten its evaporation.
Origin: LL. Graduatio promotion to a degree: cf. F. Graduation
division into degrees.
Source: Websters Vocabulary