(US, rarely Canada, education) An elementary school or primary school

(often attributive) A standard of purity suitable for medicinal use.

(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.

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

plural of grade crossing

Alternative spelling of fifth grade