Save. preponderance /prɪˈpɑːndərəns/ noun. preponderance. /prɪˈpɑːndərəns/. noun. Learner's definition of PREPONDERANCE. [singular] formal. : a greater amount or number of something. A preponderance of the evidence [=most of the evidence] shows that the accused is guilty. The preponderance [= majority ] of visitors to the museum are from outside the country. [+] more examples [-] hide examples [+] Example sentences [-] Hide examples. Comments & Questions.