/ ˈkwɪkən; NAmE / verb ( formal )
1.
to become quicker or make sth quicker :
[ v ]
She felt her heartbeat quicken as he approached.
[ vn ]
He quickened his pace to catch up with them.
2.
to become more active; to make sth more active :
[ v ]
His interest quickened as he heard more about the plan.
[also vn ]