military installation at which a body of troops is stationed; "this military post provides an important source of income for the town nearby"; "there is an officer's club on the post"
an upright consisting of a piece of timber or metal fixed firmly in an upright position; "he set a row of posts in the ground and strung barbwire between them"
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"
a pole or stake set up to mark something (as the start or end of a race track); "a pair of posts marked the goal"; "the corner of the lot was indicated by a stake"
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'"