all-important

Many improbable catastrophes might wreck the all-important Iran negotiations.

Presently Mrs Beaumont recovered herself sufficiently to put an all-important question.

Nor could the searchlights be switched on without grave risk to the all-important task of rounding-up the German torpedo-boats.

It was the first confident answer to the all-important question.

Athletics, however, contains an element which is all-important—team work.

What to many was but the fad or fashionable craze of the hour, was to him the all-important and absorbing purpose of living.