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leap in the dark
leap in the dark
A chance that one takes despite being uncertain of the consequences or outcome. I don't usually go on blind dates, but I took a leap in the dark and agreed to meet Sarah's friend for dinner.
leap in the dark
An act whose results cannot be predicted. For example, Given today's high divorce rate, he considered marriage a leap in the dark. [Late 1600s]
leap in the dark
An act whose consequences cannot be predicted.