William Stuart Adamson (11 April 1958 – 16 December 2001) was a Scottish rock guitarist and singer. Adamson began his career in the late 1970s as a founding member and performer with the punk rock band Skids. After leaving Skids in 1981, he formed Big Country and was the band's lead singer and guitarist. The group's commercial heyday was in the 1980s. In the 1990s, he was a member of the alternative country band the Raphaels. In the late 1970s the British music journalist John Peel referred to his musical virtuosity as a guitarist as "a new Jimi Hendrix".

Adamson was born in Manchester, England, to Scottish parents Anne (née Muir) and William Adamson. When he was four, his family moved to the small mining village of Crossgates, about a mile east of Dunfermline in Fife. Adamson's father, a fishing industry executive who travelled the world, encouraged his son to read literature, and both parents shared an interest in folk music. Adamson received his formal education at Beath High School.

Adamson started playing rock music during the British punk rock movement of the mid-1970s, forming a Dunfermline band called Tattoo in 1976 after seeing the Damned at a gig in Edinburgh. Besides Adamson, Tattoo included his friend William Simpson, who would also play bass guitar in their next band, Skids, which began performing in the local area and in Edinburgh.

Adamson founded Skids in 1977 when he was 18. He and Simpson first recruited drummer Thomas Kellichan and performed as a trio until meeting the 16-year-old Richard Jobson, who became the act's lead singer/frontman, Adamson and Jobson being the principal songwriters for the act.

Skids' biggest success was the single "Into the Valley", released in 1979, which reached number 10 in the UK Singles Chart. The band had four chart singles in the United Kingdom that year. Adamson was involved with the band's first three long-players, before quitting the act in 1981 after disagreements with Jobson, whose personality was increasingly dominating the band's output. Jobson later said of Adamson: "This was a guy who had a mortgage, a wife, and a family when we were all trying to live some mythic punk lifestyle. He seemed level-headed, grounded."

Adamson found international fame with Big Country, a band formed with friend and fellow guitarist Bruce Watson, then employed as a submarine cleaner at Rosyth naval base, and a rhythm section of studio musicians Mark Brzezicki and Tony Butler, found with the help of his label.

Big Country's first hit, 1983's "Fields of Fire", reached the UK's Top 10, and was rapidly followed by the album The Crossing. The album was a big hit in North America (Canada number 4, United States number 18) powered by the single "In a Big Country", which was performed on Saturday Night Live and the Grammy Awards. The video for "In a Big Country" received frequent airplay on MTV and featured the band riding all terrain vehicles in the countryside.

Their second album Steeltown appeared in October 1984. The band's third album The Seer (1986) featured Kate Bush on the title track. The first two albums were produced by Steve Lillywhite. The band continued to record studio albums and tour until 2000. Adamson supplied much of the distinctive guitar work, as well as being the lead singer and main songwriter (both music and lyrics). The band's lineup rarely underwent changes, the exception being the departure of drummer Mark Brzezicki who left in the summer of 1989 and was replaced by Pat Ahern. Brzezicki re-joined the band in 1993.