mandatory

Definition

obligatory; required or commanded by authority.

Etymology

From Late Latin mandatorius (“of or belonging to a mandator”), from mandātor (“one who commands”), equivalent to mandate + -ory; see mandate.

Example Sentences

• "Attendance at a school is usually mandatory for children."
• "This kind of immediate control structure we take to be characteristic of the tribe, and it leads to a rather rigid type of system in which 'every action not mandatory is forbidden'."
• "It also discusses the access to legal instruments for enforcement with regard to mandatory disclosure of environmental information."