The cross in the chief stands for the village's centuries-long association with the Electorate of Trier and later the Diocese of Trier. The plough refers to the time in the Early Middle Ages when the village arose as an agricultural community, and for agriculture itself, which is still undertaken in Lahr. The other charges, the cross-staff and the ear, are Saint Oranna's attributes, thus representing the church's patron saint. According to local lore, she has been revered in Lahr since the chapel was built in 1784. She is held to be the helper of those with earaches.