Origin of definition
Examples from the Web for definitional
An authoritarian, yes, but he didn't quite rise to the definitional standard of dictator.
All these things were done very publicly, with a seemingly shrewd eye toward their definitional impact on his public image.How Did Cory Booker Get Himself Into Such a Dumb Money Mess?|Stuart Stevens|August 13, 2013|DAILY BEAST
The earth should, therefore, fall under the category of "life," according to Herbert Spencer's definitional formula.
And how completely does this genesis of life take man out of the definitional formula embracing the "beasts of the earth."
British Dictionary definitions for definitional
Word Origin and History for definitional
late 14c., "decision, setting of boundaries," from Old French definicion, from Latin definitionem (nominative definitio), noun of action from past participle stem of definire (see define).
In logic, meaning "act of stating what something means" is from 1640s; meaning "a statement of the essential nature of something" is from late 14c.; the special focus on words developed after c.1550. Meaning "degree of distinctness of the details in a picture" is from 1889.