Definition from Wiktionary, the free dictionary
beatless (not comparable)
- (music) Having no beat.
1998 April 3, Peter Margasak, “Kranky and Proud of It/”, in Chicago Reader:
- Labradford's debut album, Prazision, was ambient music for indie rockers, blissfully devoid of both high-gloss digitalia and New Age goo--a series of drifting, beatless soundscapes created with analog synthesizers and heavily treated guitar.
having no beat