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n.
the state of needing something that is absent or unavailable; "there is a serious lack of insight into the problem"; "water is the critical deficiency in desert regions"; "for want of a nail the shoe was lost"
n.
an event that accomplishes its intended purpose; "let's call heads a success and tails a failure"; "the election was a remarkable success for the Whigs"
n.
a person with a record of successes; "his son would never be the achiever that his father was"; "only winners need apply"; "if you want to be a success you have to dress like a success"