If something is obligatory, you must do it because of a rule or a (Hukuk) Most women will be offered an ultrasound scan during pregnancy, although it's not obligatory These rates do not include the charge for obligatory medical consultations. = compulsory optional
morally or legally constraining or binding; "attendance is obligatory"; "an obligatory contribution" required by obligation or compulsion or convention; "he made all the obligatory apologies
If you describe something as obligatory, you mean that it is done from habit or custom and not because the person involved has thought carefully about it or really means it. She was wearing the obligatory sweater and pearl necklace. = customary
required by obligation or compulsion or convention; "he made all the obligatory apologies
required by obligation or compulsion or convention; "he made all the obligatory apologies"
Binding in law or conscience; imposing duty or obligation; requiring performance or forbearance of some act; often followed by on or upon; as, obedience is obligatory on a soldier
The legal requirement of a debtor, obligor, to pay a debt and the legal right of a creditor, obligee, to demand satisfaction of a debt or enforce payment in the event of default
morally or legally constraining or binding; "attendance is obligatory"; "an obligatory contribution"
in a manner that cannot be evaded; "the ministry considers that contributions to such a fund should be met from voluntary donations rather than from rates compulsorily levied "