Meaning of the word "post meridian" in English

What does "post meridian" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

post meridian

US /poʊst məˈrɪd.i.ən/
UK /pəʊst məˈrɪd.i.ən/

Adjective

after noon; in the afternoon

Example:
The meeting is scheduled for 3 post meridian.
We will depart at 10 post meridian.