Codex:A

Abandon ship
"Abandon ship. Abandon ship or abandon hope."

- Joshamee Gibbs

To leave completely and finally, ceasing to operate or inhabit a vessel, commonly in response to an impending threat. Given as an order by a ship's officer. Jack Sparrow's crew abandoned the Black Pearl to the Kraken, and Lord Cutler Beckett's crew abandoned the HMS Endeavour prior to its destruction.

Accord
"If you spring me from this cell, I swear on pain of death, I shall take you to the Black Pearl and your bonny lass. Do we have an accord?" "...Agreed." "Agreed. Get me out."

- Jack Sparrow and Will Turner

Agreement or concurrence of opinion, will, or action. An Agreement or harmony of things in general between parties in controversy.

Adrift
"None. But, one of the ships did pick up a man adrift at sea."

- Ian Mercer to Cutler Beckett

To be at the mercy of the wind and tide. In naval slang, it means being late or overdue for one's duty.

Adventure
"So that's it, then? That's the secret grand adventure of the infamous Jack Sparrow? You spent three days lying on a beach, drinking rum?"

- Elizabeth Swann to Jack Sparrow

The encountering of risks; hazardous and striking enterprise; a bold undertaking, in which hazards are to be encountered, and the issue is staked upon unforeseen events; a daring feat.

Aft
"Aft to port!"

- Bursar

Situated towards the stern or tail (rear) of a vessel. Opposite to bow. 

Afterlife
"Life is cruel. Why should the afterlife be any different?"

- Davy Jones

The basic term for life after death. The duty of the Flying Dutchman was to ferry souls who die at sea to the other side, into the afterlife.

Age of Piracy
"You command in an Age of Piracy where bold captains sail free waters. Where waves aren't measured in feet, but as increments of fear, and those who pass the test become legend."

- Elizabeth Swann to Sao Feng

The name given to the era of the Fourth Brethren Court.

Anchor
"Lower the starboard anchor! Do it you gobs! Or it's you we'll load into the cannons."

- Joshamee Gibbs to the crew of the Interceptor

An anchor is a heavy object, often made out of metal, that is used to attach a ship to the bottom of a body of water at a specific point to act as a weight to keep the ship from moving. There are two primary classes of anchors—temporary and permanent. A permanent anchor is often called a mooring, and is rarely moved; it is quite possible the vessel cannot hoist it aboard but must hire a service to move or maintain it. Vessels carry one or more temporary anchors which may be of different designs and weights. A sea anchor is an unrelated device: a drogue used to control a drifting vessel.

Aqua de Vida
"Oh, wait, wait! 'Aqua...de Vida.'"

- Jack Sparrow

The other name of the Fountain of Youth. In Latin, the term "Aqua" means "water", while "de Vida" means "of life". Jack Sparrow discovered that to enter the Fountain's chambers, he must speak the words "Aqua de Vida", which were inscribed upon the two Chalices of Cartagena.

Avast
"Everyone stay calm, we're taking over the ship." "Aye, avast!"

- Jack Sparrow and William Turner

A command to stop or desist, commonly "hold! stop!". 

AWE
Abbreviation of At World's End, third film in the Pirates of the Caribbean franchise.

AWEvg
Abbreviation of At World's End (video game), a game based on the second and third films of the Pirates of the Caribbean franchise.