Question 1

What does "in full swing" mean?

Accepted Answer

At the most active or successful stage of something.

Question 2

How do you use "in full swing" in a sentence?

Accepted Answer

By 9 PM the party was in full swing.

Question 3

Is "in full swing" formal or informal?

Accepted Answer

"in full swing" is register-neutral — appropriate in both casual and formal contexts. Used for events, projects, or activities that are at their peak.