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English definition of “sober”

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sober

adjective
 
 
/ˈsəʊbər/
NOT DRUNK Someone who is sober is not drunk.Drunkenness and sobriety
SERIOUS Someone who is sober is serious and thinks a lot: He was in a sober mood.Lacking humour
NOT BRIGHT UK Clothes or colours that are sober are plain and not bright: a sober, grey dressPlain and ordinaryTedious and uninspiringPale and colourless and causing colour to fadeThe qualities of colour
soberly adverb
(Definition of sober from the Cambridge Learners Dictionary © Cambridge University Press)
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