Definition of "for certain" []

• Definitely, positively, without doubt (interjection)

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• "In the fifth century he appears as head of the college of priests, as the bishop's delegate for certain duties of visitation and judgment, as his representative in case of absence or death (sede vacante)."
• "About the only thing he knew for certain that it said was that it should be deployed in space, within ten light-minutes of the star."
• "That Tom Bishop had died, and that one never knew for certain what or whom Charity remembered from one day to the next, were an endless source of grief for both their children, but maybe, in some ways, just slightly more so for Matt, who had so fiercely loved the couple who had taken him in and saved his life—and his soul—in so many ways."