1. in a loyal and steadfast manner; with complete trust and devotion
2. accurately and exactly; without changing or omitting anything
3. consistently and reliably; without fail

Examples

• She served her country faithfully for twenty years.
• The dog waited faithfully by the door for his owner’s return.
• The translator faithfully reproduced the original text.
• He faithfully attended every meeting without exception.
• The biography faithfully depicts the author’s life.
• She faithfully followed the recipe instructions.
• The assistant faithfully carried out all assigned tasks.