The phrasal verb "chill out" is predominantly used in informal contexts, particularly in spoken language among friends, family members, or in casual settings. It is rarely used in formal speech or writing. "Chill out" typically means to relax, calm down, or reduce stress, and it is often employed when someone is perceived to be getting overly worked up or anxious about a situation. For example, one might say, "You need to chill out! Everything will be fine." It can also connote taking time to rest or unwind after a busy day, as in "I'm just going to chill out this weekend and watch movies." The phrase became especially popular in the late 20th century alongside the rise of casual, laid-back lifestyles and continues to be a common expression in contemporary English, reflecting its endurance as a part of informal vernacular.
B1
PreIntermediate
1. To relax or calm down, especially after being stressed or agitated.
After the exam, she decided to chill out with some music.
He advised them to chill out and not worry about the small details.
2. To spend time in a relaxed manner, often used for leisure activities.
On weekends, I just like to chill out with my friends.
We can chill out at the park tomorrow if you’re free.