conclusive Play adjective(of evidence or argument) having or likely to have the effect of proving a case; decisive. SYNONYMS airtightbeyond a shadow of a doubtbeyond disputebeyond doubtbeyond questioncategoricalcertainclinchingconvincingdecisivedefinitedefinitivedemonstrativefinalincontestableincontrovertibleindisputableirrefutablepositiveultimateunanswerableunarguableunassailableuncontroversialundeniableunequivocalunquestionablewatertight
