essential

1. a. class="def-link" href="https://vividlex.com/word/belonging">Belonging to the class="def-link" href="https://vividlex.com/word/essence">essence, or that which makes an object, or class of objects, what it is. Source: opted

2. a. Hence, really existing; existent. Source: opted

3. a. Important in the highest degree; indispensable to the attainment of an object; indispensably necessary. Source: opted

4. a. Containing the essence or characteristic portion of a substance, as of a plant; highly rectified; pure; hence, unmixed; as, an essential oil. Source: opted

5. a. Necessary; indispensable; -- said of those tones which constitute a chord, in distinction from ornamental or passing tones. Source: opted

6. a. Idiopathic; independent of other diseases. Source: opted

7. adj. absolutely necessary; vitally necessary Source: wordnet

8. adj. basic and fundamental Source: wordnet

9. adj. of the greatest importance Source: wordnet

10. adj. being or relating to or containing the essence of a plant etc Source: wordnet

11. adj. defining rights and duties as opposed to giving the rules by which rights and duties are established Source: wordnet

12. n. anything indispensable Source: wordnet

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