Part of speech:
Necessary to the continuation of life; life-sustaining:
Without which not. Something that is indispensable and upon which something else relies.
The definition of a requirement is something that is necessary.
Of, being, or serving as a starting point or basis:
The definition of underlying refers to something lying beneath, or the basic or root cause of something.
(Music) Relating to or being a minor scale.
The definition of peripheral is something that is just outside of the main focus.
Of, relating to, or constituting the basic, essential, or fundamental part:
Not derived from something else; primary or basic:
A leading or primary principle, rule, law, or article, which serves as the groundwork of a system; essential part, as, the fundamentals of linear algebra.
Constituting or forming part of the essence of something
Acting in a subsidiary, or subordinate, capacity
The definition of optional is available, but not required.
Anything designed or intended to be discarded after use; specif., a leaflet or handbill
Miscellaneous facts, especially when the subject of questions in games and quizzes.
A part of a set or configuration, as a side of a triangle or a number in a matrix
(Archaic) The most valuable or main part of anything
The definition of imperative is something that has authority or is absolutely necessary.
Not essential; of relatively no importance; unnecessary
Necessary for completeness; essential
A fundamental element, principle, or skill, as of a field of learning:
The grade stating this requirement
Great or imperative need
Of supreme importance; decisive; critical
The definition of a must is something that has to be done.
Possessing some quality, or having been subject to some operation (as substitution), in the second degree; as, a secondary salt, a secondary amine, etc. Compare primary.
Not important; insignificant or petty.
Not essential; unessential.
(Geol.) Occurring in minor amounts in a specified rock; nonessential
Being an essential or basic part or parts
(Countable and uncountable) A requirement for something.
The first in a group or series.
The definition of needful is something that is required.
Relating to or occurring on or near the surface of the earth.
The definition of requisite is something required or necessary.
The definition of indispensable is essential or absolutely necessary.
Of the greatest importance; crucial.
- Necessary implies a pressing need but does not always connote absolute indispensability
- Requisite is applied to that which is required by the circumstances or for the purpose and generally suggests a requirement that is imposed externally rather than an inherent need the requisite experience for a position
- An indispensable person or thing cannot be done without if the specified or implied purpose is to be achieved her diagnostic skills proved indispensable to the clinic
- Essential , in strict usage, is applicable to that which constitutes the absolute essence or the fundamental nature of a thing and therefore must be present for the thing to exist, function, etc. food is essential to life
Find another word for essential. In this page you can discover 61 synonyms, antonyms, idiomatic expressions, and related words for essential, like: required, vital, necessary, sine qua non, requirement, basic, underlying, quintessential, important, minor and peripheral.