jounce /d͡ʒaʊn(t)s/noun 2verb 2forms 3 noun2 •A vigorous up-and-down movement; a jolt, a shake.Take care of the grips, or we shall have some jounces [jolts], and keep the middle of the road over Woolpit warren, for the sides are caved in, […] — 1823 •The fourth derivative of the position vector with respect to time; the time derivative of jerk.The fourth derivative (jounce) may be used to find the tangential and normal loci in the same manner as for the second and third order properties. — 1974 verb2 •To shake (someone or something) up and down, for example, by driving a vehicle over obstructions or riding a horse roughly; to jolt.Harvey Cheyne's wife, she were sick back, an' we didn't want to jounce her. — 1896 •To move vigorously up and down; to bounce, to bump, to jolt; also, to fall and hit something heavily.The lawyer was jouncing along towards the house with a lantern in his hand. — 1887 formsjounced · jouncing · jounces
