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grave doubt

/ɡreɪv ˈdaʊt/ · grav. ˈdout
noun
  1. A strong and serious uncertainty or skepticism about something. The judge expressed grave doubt about the defendant's alibi.
noun
  1. A feeling of deep concern or unease about a situation or decision. The team had grave doubt about their ability to meet the project deadline.
Did you know? The phrase 'grave doubt' has been used in various contexts, including law and philosophy, to describe a state of serious uncertainty or skepticism about a particular issue or decision.
Written by Lexi Wordsworth, Dictionary Editor 0 lookups Added Jul 26, 2026