From Longman Dictionary of Contemporary Englishlamp-postˈlamp-post, lamp post, lamppost /ˈlæmp-pəʊst $ -poʊst/ noun [countable] 
TTRa tall pole that supports a light over a street or public area
TTRa tall pole that supports a light over a street or public areaExamples from the Corpus
lamp-post• It mounted a pavement, smashed a lamp-post and ended up on its roof in the middle of the road.• At half past eleven or so, they were first spotted under a lamp-post at the end of the road.• Snowballs explode like white bombs on doors and lamp-posts.• They hung from railings and lamp-posts like baskets of old clothes.• Computer print-outs so big and heavy they'd wrenched the bin off its lamp-post.• If there had been a loose lamp-post in sight I probably would have grabbed that.• Strung between the lamp-posts like gelatine they were devoid of nocturnal magic in the middle of a winter day.• The lamp-post in the new King's Road is one of the type adapted from London cannon bollards. 