(idiomatic) To prove satisfactory; to be successful or worthy of merit.

Alternative spelling of low-grade

Of inferior quality.

(US, education) The first year of grade school, the period in school that comes after kindergarten and before second grade. Children usually begin first grade at age six.

(chiefly US) An at-grade crossing between a railroad line and an ordinary road, with tracks and road at the same level.

Someone who is in third grade.

(meteorology) A horizontal wind velocity tangent to the contour line of a constant pressure surface (or to the isobar of a geopotential surface) at or above 2,500 feet (762 meters).

The rate of decrease (gradient) of pressure in space at a fixed time. The term is sometimes used to denote simply the magnitude of the gradient of the pressure field.

(of a radioactive or other substance) Of a purity suitable for the manufacture of weapons. / (by extension, informal) Extreme.

plural of grade crossing