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Webster 1913 Edition

(jouns)

Verb.

[

imp. & p. p.

Jounced

(jounst)

;

p. pr. & vb. n.

Jouncing

(joun′sĭng)

[Cf.

To jolt; to shake, especially by rough riding or by driving over obstructions.

Noun.

A jolt; a shake; a hard trot.

jounce ‎(third-person singular simple present jounces, present participle jouncing, simple past and past participle jounced)

To jolt; to shake, especially by rough riding or by driving over obstructions.
- 1931, William Faulkner, Sanctuary, Library of America, 1985, p.51:
  She felt herself swooping, then she was lying on the bed beside Gowan, on her back, jouncing to the dying chatter of the shucks.

jounce ‎(plural jounces)

(physics) The fourth derivative of the position vector with respect to time; the time derivative of jerk.