(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:
The definition of requisite is something required or necessary.
The definition of needful is something that is required.
To necessitate or require, as by force of circumstance; demand:
The definition of imperative is something that has authority or is absolutely necessary.
To bind by a contract, promise, sense of duty, etc.; put under obligation
To require something to be brought about.
(Engineering) A statement (in domain specific terms) which specifies a verifiable constraint on an implementation that it shall undeniably meet or (a) be deemed unacceptable, or (b) result in implementation failure, or (c) result in system failure.
To assume as a premise or axiom; take for granted.
A condition that must exist or be established before something can occur or be considered; a prerequisite.
To be in need of; need
Required beforehand, esp. as a necessary condition for something following
To ask that (something) be done in accordance with a legal requirement.
Without which not. Something that is indispensable and upon which something else relies.
To give an order or orders; request that something be done or supplied.
Imposed by force; involuntary:
The definition of obligatory is necessary, required or expected as a result of law or social custom.
Want is defined as to feel a wish, desire or need for something.
To ask for; request
The definition of incumbent is laying on top of something.
To be in need
To order (someone) authoritatively to do something, esp. by legal injunction
To ask for earnestly; beg
The definition of compelling is someone or something extremely attractive or interesting.
Compelled, mandated, obligatory, or required, especially if by legal process or a statute.
Of, relating to, or based on some binding ethical rule; deontological
The definition of indispensable is essential or absolutely necessary.
An act in the past which may be used as an example to help decide the outcome of similar instances in the future.
To take in; to gather in; to mingle confusedly; to blend or merge.
To submit a written order or request for (equipment, etc.)
To deserve or call for; require:
To command, ask, or tell
Entail is defined as to require something as necessary.
Challenge means to stop someone and ask for their identification.
To imagine; conjecture.
To force payment of; extort
To consider reasonable or due:
(Obs.) To demand authoritatively
Required by fashion; fashionable
Of coercion or tending to coerce
To state or specify a demand or provision in an agreement:
The definition of optional is available, but not required.
(Rare) Without essence or existence; immaterial
To dislike is to feel distaste or hostility towards someone or something.
Find another word for required. In this page you can discover 63 synonyms, antonyms, idiomatic expressions, and related words for required, like: essential, demand, requisite, mandatory, necessary, needful, compelled, imperative, obligated, necessitated and requirement.