From Longman Dictionary of Contemporary Englishgatepostgate‧post /ˈɡeɪtpəʊst $ -poʊst/ noun [countable] 1 DHTBCone of two strong upright poles set in the ground to support a gate2 → between you, me, and the gatepost
Examples from the Corpus
gatepost• Soon he was cannoning off lime trees and, as they passed the second gates, crashed into the left-hand gatepost.• When we stood back it looked just like an ordinary gatepost.• The taxi driver was squatting by one of Bonefish's gateposts where he surreptitiously smoked a cigarette.• Henry hung around for a few minutes then gave the gatepost a kick and went home.• Sailors returning home stuck a pineapple or two on their gateposts to tell the community they were back and welcomed visitors. 