The Clarets have moved to bolster their midfield options with the signing of the experienced midfielder for a club-record fee.
Burnley has announced the signing of Steven Defour from Anderlecht for a club-record fee.
The Belgium midfielder has penned a three-year deal at Turf Moor after Anderlecht confirmed last week that the two clubs had agreed terms.
The Premier League side confirmed the fee paid was the highest in the the club's history, but did not disclose the figure.
"I hope I can bring my experience to the team and the club to stay in the Premier League," he told Burnley's official website.