obligatory

UK
/əˈblɪɡətəri/
US
/əˈblɪɡəˌtɔri/
obligatoryadjective
more obligatory
Comp.
most obligatory
Super.
UK
/əˈblɪɡətəri/
US
/əˈblɪɡəˌtɔri/
Translations
Attendance at the meeting is obligatory.
Присутствие на собрании обязательно.
Definitions
Required by a legal, moral, or other rule; compulsory.
Attendance at the meeting is obligatory for all staff members.
So customary or routine as to be expected of everyone or on every occasion.
He gave the obligatory nod of approval during the presentation.