Adjective

(en adjective)

Having the power or quality of deciding a question or controversy; putting an end to contest or controversy; final; conclusive.

''A decisive battle is fatal for one side's war chances

* {{quote-news

, year=2011 , date=November 3 , author=Chris Bevan , title=Rubin Kazan 1 - 0 Tottenham , work=BBC Sport citation , page= , passage=In truth, Tottenham never really looked like taking all three points and this defeat means they face a battle to reach the knockout stages -with their next home game against PAOK Salonika on 30 November likely to prove decisive .}}

Marked by promptness and decision.

A noble instance of this attribute of the decisive character. -J. Foster.

Adjective

(en adjective)

Relating to, or characteristic of life.

vital''' energies; '''vital''' functions; '''vital actions

Necessary to the continuation of life; being the seat of life; being that on which life depends.

The brain is a vital organ.

* Spenser

Do the heavens afford him vital food?

Invigorating or life-giving.

Necessary to continued existence.

The transition to farming was vital for the creation of civilisation.

Relating to the recording of life events.

Birth, marriage and death certificates are vital records.

Very important.

It is vital that you don't forget to do your homework.

* {{quote-magazine, date=2012-12-14

, author=Simon Jenkins, authorlink=Simon Jenkins , title=We mustn't overreact to North Korea boys' toys , volume=188, issue=2, page=23 , date=2012-12-21 , magazine= citation , passage=David Cameron insists that his latest communications data bill is “vital to counter terrorism”. Yet terror is mayhem. It is no threat to freedom. That threat is from counter-terror, from ministers capitulating to securocrats.}}

Containing life; living.

* Milton

spirits that live throughout, vital in every part

* Alexander Pope

The dart flew on, and pierced a vital part.

Capable of living; in a state to live; viable.

* Sir Thomas Browne

Pythagoras and Hippocrates affirm the birth of the seventh month to be vital .