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English definition of “amber”

amber

noun [U] uk   /ˈæm.bər/ us    /-bɚ/
a hard, transparent, yellowish-brown substance that was formed in ancient times from resin (= a substance produced by trees) and is used in jewellery: He has a collection of prehistoric insects preserved in amber.Precious and semi-precious stonesTypes of rock UK (US also yellow) the yellowish-orange traffic light that shows between the green and the red to warn drivers that the lights are about to change: The lights turned to amber.Lights, signs and markings on roads
amber
adjective uk   us  
an amber light an amber necklace (= made of amber)Precious and semi-precious stonesTypes of rockLights, signs and markings on roads
(Definition of amber from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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