I came across this phrase when watching a TED video:
"And if we really want to get out of this economic mess, if we really want high performance on those definitional tasks of the 21st century, the solution is not to do more of the wrong things, to entice people with a sweeter carrot, or threaten them with a sharper stick. We need a whole new approach."
Could you please tell me what "definitional tasks" means? The word "definitional" confuses me, can I omit it? Thank you.