Other forms: weathervanes
A weathervane is a turning pointer that shows which way the wind blows. A weathervane on the church.
It points into the wind, so a north wind turns the arrow to the north. A weathervane on a church is often a cockerel, by an old papal instruction.
1nounweathervaneA turning pointer that shows which way the wind blows.
“The weathervane had not moved in a fortnight.”
weathervane is an instrument.