simple past tense and past participle of grade on a curve

(anthropology) An organized, culturally defined social category of people with membership based on age; in some societies it is entered automatically when one reaches a certain age, while in others it is entered through an initiation rite and/or the payment of a fee.

Of the highest quality.

(rail transport, US) A railroad gradient where helper locomotives are required to assist the train locomotives.

(Canada, Philippines) Seventh grade.

(Canada, Philippines) Third grade.

(Canada, Philippines) Fourth grade.

Alternative spelling of grade one

(Canada, Philippines) Twelfth grade.

Alternative spelling of grade four