legitimatereason

noun
UK /lɪˈdʒɪtɪmət ˈriːzən/
US /ləˈdʒɪtəmət ˈrizən/

A good and fair reason that makes sense.

She had a legitimate reason for being late because her bus broke down.


OTHER MEANINGS

2. A reason that follows the rules or the law.

The teacher accepted his legitimate reason for missing the test.

3. A real reason that is true and not made up.

Wanting to help his friend was a legitimate reason to volunteer.

4. A reason that other people can understand and accept.

Needing to care for a sick family member is a legitimate reason to stay home.