Doubt/daʊt/ Definition 1 of 4Pro Tip 1/3Expressing Uncertainty Use 'doubt' to show you're unsure, adding intensity to your uncertainty. I doubt we'll make it in time. Pro Tip 2/3Avoiding Direct Denial Say 'I have my doubts' to softly disagree without directly saying 'no'. I have my doubts about this theory. Pro Tip 3/3Seeking Reassurance Use 'doubt' to invite others to reassure or convince you on a point. I doubt it's safe, can you convince me?