Irrefutable/ˌɪrɪˈfjuːtəbl/ Definition 1 of 1Pro Tip 1/3Legal Context Often used in legal discussions where evidence must be beyond doubt. The prosecutor's case was built on irrefutable DNA evidence. Pro Tip 2/3No Counterargument 'Irrefutable' implies no valid opposing argument exists because the fact is certain. Her account of events was supported by irrefutable data. Pro Tip 3/3Strength of Claim Used to express the strongest level of certainty about a claim or fact. The irrefutable findings changed the scientific community's stance.