Adj. | 1.vapourific - (used of substances) capable of being volatilizedevaporable, vaporific, vaporizable, vapourisable, volatilisable, volatilizablevolatile - evaporating readily at normal temperatures and pressures; "volatile oils"; "volatile solvents" | | 2. vapourific - resembling or characteristic of vapor; "vaporous clouds"vaporish, vapourish, vapourous, vaporous, vaporificgaseous - existing as or having characteristics of a gas; "steam is water is the gaseous state" |