: a circumstance, quality, or person that has a strong but unpredictable influence
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Two X factors are also widely assumed to be in Paramount’s favor.—Dade Hayes, Deadline, 14 May 2026 The Lakers tried to spark their X factor in the third quarter.—Los Angeles Times, 10 May 2026 Saint Mary’s brings a potential X factor in sophomore center Andrew McKeever, whose 7-foot-3 frame presents an uncommon issue for opponents.—Ron Kroichick, Houston Chronicle, 18 Mar. 2026 Foto Olimpik—NurPhoto/Getty Images Petrosian, who is currently fifth after the short program, is the Russian national champion for the third year in a row and the X factor in the competition.—Alice Park, Time, 18 Feb. 2026 See All Example Sentences for X factor