mandatory

You must comply

Mandatory means required, not optional.

A mandatory meeting must be attended; mandatory sentencing laws remove judicial discretion.

The word carries more force than required—it suggests official compulsion or strict rules: Helmets are mandatory for all riders.

The noun mandate shares the sense of authoritative command.

compulsory

required

Needed by rule

prerequisite · essential · necessary · binding · unavoidable · inescapable · nonnegotiable · indispensable · imperative · forced

regulatory

statutory

Established by enacted law

imposed · dictated · standardized · codified · legislated · enacted · sanctioned · authorized · enforceable · compliance

requirement

prerequisite

Required prior condition

qualification · criterion · specification · threshold · baseline · minimum · standard · benchmark · checkpoint · hurdle

Categories
Opposites
requirement/compulsion

mandatoryoptional

Not mandatory

voluntary · elective · discretionary · nonmandatory · non-compulsory

necessity/essentiality

mandatoryunnecessary

Not essential or required

nonessential · dispensable · unneeded · optional · inessential

Phrases
Family

mandatorily, mandatories

Familiarity
Top 10,000
Profile
Known to kids · Used worldwide · Timeless · Abstract · Everyday, not technical · Rated G