The word "co-ed" is short for "coeducational." It describes schools, colleges, or universities that have both male and female students.
As an Adjective: When you use "co-ed" as an adjective, you are talking about a place, like a school, where both boys and girls study together.
As a Noun: It can also refer to a female student who attends a coeducational school.
In some contexts, "co-ed" can also refer to activities or sports that include both male and female participants. - Example: "They have a co-ed soccer team where both boys and girls play together."
"Co-ed" is a simple term to use when discussing schools or colleges that include both boys and girls. It can also describe female students in these settings.