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The definition of essential
11 Definitions of: essential
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- adjective, vitally important; absolutely necessary
- adjective, basic; fundamental
- adjective, completely realized; absolute; perfect
- adjective, biochem (of an amino acid or a fatty acid) necessary for the normal growth of an organism but not synthesized by the organism and therefore required in the diet
- adjective, derived from or relating to an extract of a plant, drug, etc
- adjective, logic (of a property) guaranteed by the identity of the subject; necessary. Thus, if having the atomic number 79 is an essential property of gold, nothing can be gold unless it has that atomic number
- adjective, music denoting or relating to a note that belongs to the fundamental harmony of a chord or piece
- adjective, pathol (of a disease) having no obvious external cause
- adjective, geology (of a mineral constituent of a rock) necessary for defining the classification of a rock. Its absence alters the rock's name and classification
- noun, something fundamental or indispensable
- noun, music an essential note
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| Synonyms: | prerequisite, principle, fundamental, necessity, must, basic, requisite, sine qua non (Latin), rudiment, must-have | And more... |
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| Antonyms: | secondary |
From Collins
©HarperCollins 2008. Collins English Dictionary definition of essential