vaporise v 1: cause to change into a vapor; "The chemist evaporated the water" [syn: {evaporate}] 2: change into a vapor; "The water evaporated in front of our eyes" [syn: {evaporate}] 3: turn into gas; "The substance gasified" [syn: {gasify}, {vaporize}, {aerify}] 4: lose or cause to lose liquid by vaporization leaving a more concentrated residue; "evaporate milk" [syn: {evaporate}, {vaporize}]