I. adjective
Etymology: Middle English, from present participle of quickenen to quicken — more at quicken
: that quickens
as quickening as the ideas … that had followed in the wake of the French Revolution — Donald Davidson
II. noun
( -s )
Etymology: Middle English, from gerund of quickenen to quicken
: the first motion of a fetus in the uterus felt by the mother usually somewhat before the middle of the period of gestation