noun
    
    [noncount] Mail is used in British English but it is much more common in U.S. English. The usual word in British English is post.
    
    the system used for sending letters and packages from one person to another
    
    
    
    
    
    
    
    
    
    
    
    letters or packages sent from one person to another
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    e-mail
    
    
    
    the mails
    
    chiefly US law formal :the system used for sending letters, packages, etc. :a nation's postal system
    
    
    
    
    
    verb
    
    mails; mailed; mailing
    
    [+ obj] chiefly US :to send (something, such as a letter or package) by mail
    
    
    
    
    
    noun
    
    [noncount] :a kind of protective clothing (called armor) that is made of many small pieces or rings of metal which are linked together