- The definition of merciful is someone who is caring, compassionate, and gentle with discipline.
An example of merciful is a principal who gives detention instead of suspending students.
full of mercy; having, feeling, or showing mercy; compassionate; lenient; clement
Full of mercy; compassionate: sought merciful treatment for the captives.
(comparative more merciful, superlative most merciful)
- showing mercy
mercy +â€Ž -ful