English adjective: obligatory | |||
1. | obligatory morally or legally constraining or binding | ||
Samples | Attendance is obligatory. An obligatory contribution. | ||
Similar | bounden, compulsory, de rigueur, imposed, incumbent on, indispensable, mandatory, prerequisite, required | ||
See also | necessary | ||
Antonyms | optional | ||
2. | obligatory required by obligation or compulsion or convention | ||
Samples | He made all the obligatory apologies. | ||
Similar | necessary | ||
Antonyms | unnecessary, unneeded | ||