B1
a short piece of writing about a particular subject, especially one done by students
Dictionary examples:
I wrote an essay about procrastination, but I'll finish it tomorrow. (0.0)
I wrote an essay about exercise while sitting on the couch eating chips. (0.0)
My dog ate my essay, but the teacher didn't believe me. (0.0)
For homework I want you to write an essay on endangered species. (43.9)