The meaning of “בֵּית פְּעוֹר”

“So we abode in the valley over against Beth–peor. ”

“On this side Jordan, in the valley over against Beth–peor, in the land of Sihon king of the Amorites, who dwelt at Heshbon, whom Moses and the children of Israel smote, after they were come forth out of Egypt:”

“And he buried him in a valley in the land of Moab, over against Beth–peor: but no man knoweth of his sepulchre unto this day.”

“And Beth–peor, and Ashdoth–pisgah, and Beth–jeshimoth,”