(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.
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 necessitate or require, as by force of circumstance; demand:
A condition that must exist or be established before something can occur or be considered; a prerequisite.
(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 be in need of; need
Imposed on one by authority, command, or convention
To require something to be brought about.
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.
(Rare) Without essence or existence; immaterial
To dislike is to feel distaste or hostility towards someone or something.
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
Required by fashion; fashionable
The definition of optional is available, but not required.
To ask that (something) be done in accordance with a legal requirement.
To assume as a premise or axiom; take for granted.
The definition of compelling is someone or something extremely attractive or interesting.
The definition of incumbent is laying on top of something.
Required beforehand, esp. as a necessary condition for something following
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 have or exercise supreme power, control or authority over, especially military; to have under direction or control.
To submit a written order or request for (equipment, etc.)
To be in need
To order (someone) authoritatively to do something, esp. by legal injunction
To ask for earnestly; beg
Entail is defined as to require something as necessary.
To express the need or desire for
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.
To consider reasonable or due:
To deserve or call for; require:
To command, ask, or tell
Challenge means to stop someone and ask for their identification.
To imagine; conjecture.
Of coercion or tending to coerce
To state or specify a demand or provision in an agreement:
Find another word for required. In this page you can discover 63 synonyms, antonyms, idiomatic expressions, and related words for required, like: essential, requisite, demand, necessary, mandatory, needful, imperative, obligated, compelled, precondition and requirement.