Definition:
The word "astern" is an adverb that means "behind" in relation to a ship or an airplane. It is used to describe something that is located at or near the back of these vehicles.
Basic Example: "We dropped the anchor astern, so the boat would stay in place."
(This means the anchor was placed behind the boat.)
Advanced Example: "The captain looked astern to see if there were any other ships approaching."
(Here, the captain is checking behind the ship.)
Currently, there are no widely used idioms or phrasal verbs that include "astern." However, you might encounter phrases like "look astern," which means to look back or check what is behind you.
In summary, "astern" is a specific term used to describe something located behind a ship or airplane. It is essential in maritime and aviation language and can describe both position and movement.