a conveyance that transports the letters and packages that are conveyed by the postal system
the system whereby messages are transmitted via the post office; "the mail handles billions of items every day"; "he works for the United States mail service"; "in England they call mail `the post'"
the bags of letters and packages that are transported by the postal service
any particular collection of letters or packages that is delivered; "your mail is on the table"; "is there any post for me?"; "she was opening her post"
cause to be directed or transmitted to another place; "send me your latest results"; "I'll mail you the paper when it's written"
send via the postal service; "I'll mail you the check tomorrow"
make a counterattack and return like for like, especially evil for evil; "The Empire strikes back"; "The Giants struck back and won the opener"; "The Israeli army retaliated for the Hamas bombing"