What is Annual Leave?

Legal Definition
Annual leave is paid time off work granted by employers to employees to be used for whatever the employee wishes. Depending on the employer's policies, differing number of days may be offered, and the employee may be required to give a certain amount of advance notice, may have to coordinate with the employer to be sure that staffing is adequately covered during the employee's absence, and other requirements may have to be met. The vast majority of countries today mandate a minimum amount of paid annual leave by law, though the United States is a notable exception in mandating no minimum paid leave and treating it as a perk rather than a right.
-- Wikipedia
Legal Definition
The time an employee can be off work without any consequences. It is paid and can be requested at the employees time of choosing.