With all due respect to your fourth grade teacher, the web's definition of the term is as follows. "Complementarianism is a theological view in Christianity, Judaism, and Islam,[1] that men and women have different but
complementary roles and responsibilities in marriage, family life, and religious leadership."
https://en.m.wikipedia.org/wiki/Comp...%20this%20view
One way or the other, it is hardly the biased description given earlier.
BTW, I did not mention "defined". I said, "Can’t be
understood or properly
described without it.". You need to readjust your glasses.