1. postbox; mailbox; mail box; pillar box
どうやらポストに入れるつもりらしい。It seems they intend to put it in the mailbox.
2. post; position
いきなり重要なポストを任され、動揺する。Suddenly entrusted with an important post, I'm thrown off balance.
3. post (e.g. goalpost)
Noun
Verb (する, transitive)
Internet
4. post (on a blog, social media, etc.)
5. post- (e.g. post-Cold War)