AMBER

[noun] [U] - a hard transparent yellowish-brown substance which was formed in ancient times from the liquid of trees and is used in jewelleryHe has a collection of prehistoric insects preserved in amber.Would you like an amber necklace for your birthday?(UK) Amber (US and ANZ yellow) is the yellowish-orange traffic light which shows between the green and the red to warn drivers that the lights are about to change.The lights turned to amber. [U]He almost had an accident when he drove through an amber that was just about to change to red. [C]You should stop at an amber light.