Noun
postbox; mailbox; mail box; pillar box
いったんポストに入れたものは、郵便局の所轄になる。Once a thing is posted, it is in the care of the Post Office. post; position
post (e.g. goalpost)
Noun, Suru verb, Transitive verb
post (on a blog, social media, etc.)
Networking, WWW
Noun or verb acting prenominally
post- (e.g. post-Cold War)