beat generation, term applied to certain American artists and writers who were popular during the 1950s. Essentially anarchic, members of the beat generation rejected traditional social and artistic forms. The beats sought immediate expression in multiple, intense experiences and beatific illumination like that of some Eastern religions (e.g., Zen Buddhism). In literature they adopted rhythms of simple American speech and of bop and progressive jazz. Among those associated with the movement were the novelists Jack Kerouac and Chandler Brossard, numerous poets (e.g., Kenneth Rexroth, Allen Ginsberg, Lawrence Ferlinghetti, and Gregory Corso), and others, many of whom worked in and around San Francisco. Perhaps the only true nihilist of the group was William S. Burroughs. During the 1960s "beat" ideas and attitudes were absorbed by other cultural movements, and those who practiced something akin to the "beat" lifestyle were called "hippies."

In physics, the pulsation resulting from a combination of two waves of slightly different frequency. Beat frequency is the difference between the frequencies of the combining waves. When the interfering frequencies are in the audible range, the beats are heard as alternating soft and loud pulses. The human ear can detect beats with frequencies up to 10 hertz, or 10 beats per second. Piano tuners listen for beats when comparing the pitch of a tuning fork to that of a vibrating string; when no beats are heard, the fork and string are at the same frequency. Ultrasonic or inaudible frequencies can be superimposed to produce audible beats, allowing the detection of vocal sounds produced by bats or dolphins.

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American social and literary movement of the 1950s and '60s. It is associated with artists' communities in San Francisco, Los Angeles, and New York. Its adherents expressed alienation from conventional society and advocated personal release and illumination through heightened sensory awareness and altered states of consciousness. Beat poets, including Lawrence Ferlinghetti, Allen Ginsberg, Gregory Corso (1930–2001), and Gary Snyder, sought to liberate poetry from academic refinement, creating verse that was vernacular, sometimes sprinkled with obscenities, but often powerful and moving. Jack Kerouac and William S. Burroughs developed an unstructured, spontaneous, sometimes hallucinatory approach to prose writing that was designed to convey the immediacy of experience. The Beat movement had faded by circa 1970, though its influence continued to be felt decades later.

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