Short has many meanings. When one of us asks the other why she is "short" (as in curt) she says she can't help it because her parents were short (as in height). Laugh. Short also applies to not having enough cash. Or distance, from A to B. And now, more than ever, it applies to cruises.
In response to public demand (or at least preference), Princess is adding more "short" cruises — moistly four days long. For example, the Ruby Princess is sailing four of them as Caribbean getaways in the month of December, and there is talk Princess will ramp up the number right into 2015.
We've been on a couple of shorties, three or four days, but they wouldn't be our choice. When we cruise, the idea of a "getaway" is a chance to relax, which usually takes most people more than a few days.
However, times have changed. Maybe the fast-food, quick-hit, short-clip world is starting to impact the cruise business.
Or maybe "short" was just looking for another definition.

Celebrity Equinox
14 nights
November 25, 2013
Barcelona, Cartagena, Malaga, Cadiz, Tenerife, Fort Lauderdale
Balcony: $849
Cost per day: $70
www.celebritycruises.com