Likelihood/ˈlaɪklihʊd/ Definition 1 of 1Pro Tip 1/3Estimating Future Events Used when making an educated guess about future events, not certain but likely. Given the dark clouds, the likelihood of a storm tonight seems strong. Pro Tip 2/3Conveying Uncertainty Even with a 'high likelihood', you're indicating there's some doubt. There's a high likelihood that she'll join us, but it's not guaranteed. Pro Tip 3/3Expressing Small Chances When something is unlikely, 'low likelihood' implies it's not impossible, just not probable. There's a low likelihood of winning the lottery.