On the Definition of in school page of Merriam-Webster, the US tag is used.
While the Definition of at school page uses the British tag.
Does that kind of tag indicate where the item is being used? In this example, Americans use "in school" while "at school" is more common in BrE.
Is my understanding correct?


in schoolwhile British English speakers tend toat school", which looks shorter? – JQQ Aug 03 '20 at 01:23