Antonym: unnecessary, chance. Similar words: necessary, recessive, recession, excessive, accessible, processing, concession, go to pieces. Meaning: [nɪ'sesətɪ] 
n. 1. the condition of being essential or indispensable 2. anything indispensable.
n. 1. the condition of being essential or indispensable 2. anything indispensable. 
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61. He is changing job out of necessity, not because he particularly wants to.
62. This illustrates the necessity of keeping accurate records of your work.
63. Some people have to lead stressful lifestyles out of necessity.
64. These animals don't like water but will swim if the necessity arises.
65. The necessity for traveling on business has estranged her from her family.
66. Observers stressed the necessity for the ceasefire to be observed.
67. Being short of money, I made a virtue of necessity and gave up smoking.
68. It would be the first time in human history that economic necessity has prevailed over military aggrandize-ment.
69. The company sees no necessity for a more cautious approach to investment.
70. There's no necessity to write to your mother every single day.
71. Out of necessity or out of interest, people go back to school for the common goal - to improve themselves.
72. She was driven by necessity to steal food for her starving children.
73. I'm afraid it's become a matter of economic necessity .
74. With a courage born of necessity[sentencedict.com], she seized the gun and ran at him.
75. His aspirations were submerged by the necessity of making a living.
76. The President pleaded that strong rule from the centre was a regrettable, but temporary necessity.
77. She saw the necessity to make an immediate impression on him.
78. The necessity of making a living disentranced him from his gamble.
79. Many teachers are now questioning the necessity of formal exams.
80. I had a couple of months to spare between jobs so I thought I'd make a virtue of necessity by acquiring a few new skills.
81. I took the job out of necessity because we had no money left.
82. Most of the women are forced, through economic necessity,(www.Sentencedict.com) to work in part-time low-paid jobs.
83. Culling of the animals was born out of the necessity for successful conservation.
84. Mr Casey said he could see no necessity to add any rider on the use of firearms by police.
85. I bought a candle out of necessity.
86. Literature is a luxury; fiction is a necessity. G.K. Chesterton 
87. Necessity is the mother of taking chances. Mark Twain
88. Of necessity, this entailed an accommodation with Rome.
89. Both sides finally conceded that surgery was a necessity.
90. Clean air and water is a necessity of life.
More similar words: necessary, recessive, recession, excessive, accessible, processing, concession, go to pieces, excess, access, success, process, incessant, density, obesity, processor, in excess of, adversity, diversity, intensity, curiosity, session, propensity, university, successfully, sensitivity, confession, depression, aggressive, impression.