Something that is essential is extremely important or absolutely necessary to a particular subject, situation, or activity. It was absolutely essential to separate crops from the areas that animals used as pasture As they must also sprint over short distances, speed is essential Jordan promised to trim the city budget without cutting essential services. = crucial
That which is essential; first or constituent principle; as, the essentials of religion
Containing the essence or characteristic portion of a substance, as of a plant; highly rectified; pure; hence, unmixed; as, an essential oil
The essentials are the things that are absolutely necessary for the situation you are in or for the task you are doing. The flat contained the basic essentials for bachelor life
The essential aspects of something are its most basic or important aspects. Most authorities agree that play is an essential part of a child's development In this trial two essential elements must be proven: motive and opportunity. = fundamental
In low-dimensional topology, a non-trivial kind of curve or surface in a manifold that only sometimes exists An essential sphere in a 3-manifold, for example, is a sphere that does not bound a ball
basic and fundamental; "the essential feature" absolutely required and not to be used up or sacrificed absolutely necessary; vitally necessary; "essential tools and materials"; "funds essential to the completion of the project"; "an indispensable worker" being or relating to or containing the essence of a plant etc; "essential oil