what's the meaning of "single sex"

what's the meaning of "single sex"
what's the meaning of "single sex"

what's the meaning of "single sex"
single sex 主要用在教育中,意思是男女分校.
对应的是 co-education 就是男女混校.

single-sex ：单性别

同性恋

“单一性别”是什么意思？