post

Post is the letters and parcels that you send to other people.

Example: There's no post today because it's a Sunday.

A post is a tall rod or stick. Examples are a sign post, a lamp post, and a goal post.

If you post something, you send it through the post.

Example: I posted a birthday card to him last week.

If you post a message, you add it to a website or discussion board.

Example: I posted a reply to your comment on the website.

after

Example: Post the test results becoming public, there were many complaints.