From Longman Dictionary of Contemporary Englishacorna‧corn /ˈeɪkɔːn $ -ɔːrn, -ərn/ noun [countable] HBPthe nut of the oak tree
Examples from the Corpus
acorn• Cornelius observed that the wooden bobbin dangling on a string from the window blind was the shape of an acorn.• Do you think the sky is falling when an acorn falls?• An acorn is tiny compared to its parent, but a kiwi lays an egg a quarter her own weight.• The absurd idea, he wrote, that a work of art grows from nothing into something, from acorn into oak.• May acorns fall from an oak.• The vessel was probably used to store acorns or water, Ver Planck said.• Here in the 1844 the Wellington Monument was erected which tells the story of the acorns.• The acorns should be picked from trees, not the ground.From Longman Business DictionaryACORNACORN /ˈeɪkɔːn-ɔːrn, -ərn/ nounMARKETING A Classification of Residential Neighbourhoods; a system in Britain of putting areas of the country into different classes according to the incomes of the people who live therethe five local authorities with the worst housing conditions under the ACORN schemeOrigin acorn Old English æcern 