cool down v 1: make cool or cooler; "Chill the food" [syn: {cool}, {chill}, {cool down}] [ant: {heat}, {heat up}] 2: lose intensity; "His enthusiasm cooled considerably" [syn: {cool}, {cool off}, {cool down}] 3: loose heat; "The air cooled considerably after the thunderstorm" [syn: {cool}, {chill}, {cool down}] [ant: {heat}, {heat up}, {hot up}]