From the American Heritage Dictionary:
1. A word or phrase having a double meaning, especially when the second meaning is risqué.
2. The use of such a word or phrase; ambiguity.
One of my all-time favorite shows was a very short-lived show called Turn On (1969). Unfortunately, all I can remember about the show was that it was full of double-entendres, especially those delivered by a sultry, curvaceous actress called "The Body Politic" who reclined on a sofa. Alas, the world was not ready for such a show. It lasted for one 30-minute episode, and many stations cut it off before it was finished. It would probably be rated PG these days, but it was too much for the mores of 1969.
O Tempora! O Mores!