At an underground party, Joyce introduced Peggy to her friend Abe Drexler (Charlie Hofheimer), a beatnik journalist.
At the ceremony and afterward I got to thinking about the underground Railroad.
Rudd does detail his underground bouts with ennui that spiraled into depression.
1570s, "below the surface," from under + ground (n.). As an adjective, attested from c.1600; figurative sense of "hidden, secret" is attested from 1630s; adjectival meaning "subculture" is from 1953, from World War II application to resistance movements against German occupation, on analogy of the dominant culture and Nazis. Noun sense of "underground railway" is from 1887 (shortened from phrase underground railway, itself attested from 1834).