The moves had been expected because coach Jack Del Rio already told the three aging veterans they would not be part of the team's rebuilding process.
Holt, a seven-time Pro Bowl selection with St. Louis, caught 51 passes for 722 yards with the Jaguars last season. He has 920 career receptions for 13,382 yards and 74 touchdowns.
Thomas, a three-time Pro Bowler with Philadelphia, started three games for the Jaguars last season.
Meier, a 10-year veteran who spent last season on injured reserve, has 307 career tackles and ranks ninth in team history with 21½ sacks.