Part of speech:
That cannot be avoided; inevitable
(Biochemistry) Being a substance that is required for normal functioning but cannot be synthesized by the body and therefore must be included in the diet:
Serving to bind:
Of coercion or tending to coerce
Compelled, mandated, obligatory, or required, especially if by legal process or a statute.
The definition of imperative is something that has authority or is absolutely necessary.
The definition of incumbent is laying on top of something.
Not remissible; unpardonable:
The definition of optional is available, but not required.
(Law) Without legal obligation or consideration:
The definition of requisite is something required or necessary.
Imposed on one by authority, command, or convention
Find another word for obligatory. In this page you can discover 18 synonyms, antonyms, idiomatic expressions, and related words for obligatory, like: unavoidable, required, essential, binding, necessary, coercive, compulsory, imperative, incumbent, irremissible and mandatory.