"cooling" in the noun sense
1. cooling, chilling, temperature reduction
the process of becoming cooler a falling temperature
2. cooling system, cooling
a mechanism for keeping something cool
"the cooling was overhead fans"
"cooling" in the verb sense
1. cool, chill, cool down
make cool or cooler
"Chill the food"
2. cool, chill, cool down
"The air cooled considerably after the thunderstorm"
3. cool, cool off, cool down
"His enthusiasm cooled considerably"
Source: WordNet® (An amazing lexical database of English)
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