A more thorough explanation:

Definition: Wholly, adverb. Not partially; fully; completely.

Examples:

• I am wholly committed to finishing this project on time.
• The company is wholly owned by its employees.
• She was wholly unprepared for the exam.

The examples illustrate that "wholly" means completely or fully. In the first example, the person is fully committed to finishing the project. In the second example, the company is fully owned by its employees. In the third example, the person was completely unprepared for the exam.