an iced drink especially white wine and fruit juice
"We poured a glass of chilled white wine mixed with lemonade as our cooler to enjoy on the patio."
Anything which cools.
"The cooler inside the garage kept the drinks frosty even on a hot summer day."
comparative form of cool: more cool
"The northern breeze made the evening feel much cooler than the hot afternoon had been."
In plain English: Cooler describes something that is very nice, impressive, or exciting to look at or experience.
"The ice cream tastes much cooler than the warm soda outside."
The word cooler is formed by adding the suffix -er to cool. It originally referred simply to something that makes things cold but has since evolved to mean a place or person where people relax and socialize.