The threat of a thunderstorm made it necessary to cancel the picnic.
It's not necessary to wear a tie.
Food is necessary for life.
We had all the necessary ingredients.
She took the medicine only when absolutely necessary.
Higher prices are a necessary consequence of the company's new services.
Some say that Hvorostovsky's Don Giovanni lacks the necessary menace; others find that he tosses his mane about too flamboyantly. —Francine Du Plessix Gray, New Yorker, 22 Sept. 2003
From the very outset the eminence of this new creature, the intellectual, … was inseparable from his necessary indignation. —Tom Wolfe, Harper's, June 2000
Our most cataclysmic moments are typically free of gravitas, of necessary thunder; a person dies, but instead of the sky darkening and lightning striking, the sun continues to shine and the birds to sing. —Alain de Botton, Harper's, October 1998
See necessary defined for English-language learners
Examples of NECESSARY
<a modest income that provided the family with only the necessaries of life>
“I thoroughly understand you,” cried Mrs. Norris, “… My dear Sir Thomas, with all my faults I have a warm heart; and, poor as I am, would rather deny myself the necessaries of life than do an ungenerous thing.” —Jane Austen, Mansfield Park, 1814
I took up the two officers in my hands, put them first into my coat-pockets, and then into every other pocket about me, except my two fobs, and another secret pocket I had no mind should be searched, wherein I had some little necessaries that were of no consequence to any but myself. —Jonathan Swift, Gulliver's Travels, 1726