An order meaning keep silence; a pipe down at sea means a free afternoon to catch up on lost sleep.

Order to boatswain's mate to pipe hands 'down from aloft'. Now used, in R.N., to inform hands that they will not be required for work; or, at night, that hands are to turn in. 2. Be qui [..]

A signal on the bosun's pipe to signal the end of the day, requiring lights (and smoking pipes) to be extinguished and silence from the crew.

This originally nautical term was used as an officer's whistle sound denoting the completion of an above-deck work shift and thereby giving permission to go below. This expression is now used to [..]

A call on the bo'sun's pipe at night for the hands to turn in, for silence in the messdecks, and for lights to be extinguished. Also a term used by a sailor to another to make them stop talk [..]

an order to be quiet. Originally, a call on a boatswain's pipe to send the crew below.

A signal on the bosun's pipe to signal the end of the day, requiring lights (and smoking pipes) to be extinguished and silence from the crew.

Means stop talking and be quiet. The Pipe Down was the last signal from the Bosun's pipe each day which meant "lights out" and "silence".

Originally, a call on a boatswain's whistle sending the crew below. It has come to mean 'be quiet.'

A signal on the bosun's pipe to signal the end of the day, requiring lights (and smoking pipes) to be extinguished and silence from the crew

A call on the bo'sun's pipe at night for the hands to turn in, for silence in the messdecks, and for lights to be extinguished. Also a term used by a sailor to another to make them stop talk [..]