VASODILATION Meaning of VASODILATION in English (also vasodilatation -ˌdʌɪleɪ'teɪʃ(ə)n ) ■ noun the dilatation of blood vessels, which decreases blood pressure.Derivativesvasodilator nounvasodilatory adjective Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004