Definition of "teacher"

One particularly damaging, but often ignored, effect of conflict on education is the proliferation of attacks on schools […] as children, teachers or school buildings become the targets of attacks. Parents fear sending their children to school. Girls are particularly vulnerable to sexual violence.

2013 July 19, Mark Tran, “Denied an education by war”, in The Guardian Weekly, volume 189, number 6, page 1

But if the last two years are a teacher, look for the bombastic tweets to resume before sunrise.

2017 February 28, Steve LeVine, “Trump Speech to Congress: The Message Was Trumpian, But The Tone Was Decidedly Not”, in Quartz‎