compulsory

Required; obligatory; mandatory.

The ten-dollar fee was compulsory.

They are entirely private concerns, established by individual teachers, and attendance upon them is no more compulsory than attendance on our dispensaries.

Having the power of compulsion; constraining.

Such compulsory measures are limited.

There will be financial and other incentives to encourage voluntary recruitment, but if that fails to find the numbers a compulsory nationwide call-up will be reconsidered.

Something that is compulsory or required.

Delobel and Schoenfelder failed to win the free dance, but they had built a big lead in the compulsories and the original dance.