The impact of Definitely Maybe was immediate in the United Kingdom. It arrived just after singles like "Supersonic" and "Shakermaker", and the success on American modern radio of "Live Forever". The album debuted at number one on the British charts, becoming the fastest debut in British music history at the time. It became a benchmark for the Britpop genre, and over time, publications like NME or Spin included it in their lists of the best albums. It is the only Oasis album to feature the complete original lineup, as Tony McCarroll left the band in early 1995.
The band, formed in 1991 and originally called The Rain, consisted of Paul "Bonehead" Arthurs, Paul "Guigsy" McGuigan, Tony McCarroll, and Liam Gallagher. Shortly after, Liam invited his older brother, Noel, to join. Although there was the idea that Noel was coming in to take full control, he himself has said that it wasn't exactly like that. Noel was responsible for writing all the songs on the album, although Bonehead has recalled how he himself contributed the riff for "Up in the Sky" and Noel built the song from there. The overall sound of the album, according to Allmusic, mixes the best of rock and roll, from The Beatles to The Stone Roses.