The phrase "justified reason" means having a valid and logical explanation for doing something or believing in something. It involves having a good enough reason that can be understood and accepted by others.
Sentences with «justified reason»
Does the script justify her reasons for completely turning her back on performing? (parentpreviews.com)
As nobody writes a cover letter without a reason, this paragraph should justify the reason behind writing it. (bestcoverletters.com)
Many more parents with small children are working, too, for similar, equally justified reasons. (godiaperfree.com)