noun
    
    plural -pers
    
    [noncount] :a reddish-brown metal that allows heat and electricity to pass through it easily
    
    
    
    
    
    
    
    [noncount] :a reddish-brown color - usually used before another noun
    
    
    
    
    
    see color picture
    
    [count] chiefly Brit informal :a copper or bronze coin that has little value
    
    
    
    noun
    
    plural -pers
    
    [count] chiefly Brit informal :police officer - compare 1copper