420

Etymology 1
So named because it is 420 centimetres long.

Noun

 * 1) A particular type of monohull dinghy with two sails, designed for two people.

Etymology 2
Likely influenced by the time (4:20 pm) a particular group would meet in search of marijuana, circa 1971; subsequently spread as a cipher through the San Francisco Bay area and adopted among Grateful Dead fans.

Noun

 * 1) Cannabis.
 * 2)  Pertaining to cannabis, its consumption, or cannabis culture.
 * 3) April 20, as an occasion to celebrate cannabis culture.
 * 1) April 20, as an occasion to celebrate cannabis culture.