vital


Concise Oxford English Dictionary © 2008 Oxford University Press:
vital/ˈvʌɪtl/
adjective
  • 1 absolutely necessary; essential.

    ■ indispensable to the continuance of life: the vital organs.

  • 2 full of energy; lively.
  • 3 archaic fatal.
noun (vitals) the body's important internal organs.
– derivatives
vitally adverb.
– origin ME: via OFr. from L. vitalis, from vita ‘life’.
'vital' also found in these Oxford entries:

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