Jitter is commonly defined as the deviation in the scheduled arrival of events, particularly in engineering contexts like DVD mastering, where it refers to timing inaccuracies. The discussion highlights that scientists may use the term differently, suggesting a need for clarity in its definition. Additionally, the term "zitterbewegung," which means "jittery motion," is mentioned in relation to relativistic quantum mechanics, indicating its broader scientific relevance. There is an implication that a mathematical framework may exist to describe jitter more precisely. Understanding these nuances is essential for accurate communication in scientific discussions.