bunk [bunkbunksbunkedbunking] noun, verb BrE [bʌŋk] NAmE [bʌŋk] noun 1. countable a narrow bed that is fixed to a wall, especially on a ship or train 2. countable (alsoˈbunk bed)one of two beds that are fixed together, one above the other, especially for children 3. uncountable (old-fashioned, informal)nonsense Syn: ↑bunkum