To pass over without stopping. Skipping is a choice, and an unrecorded skip looks exactly like an absence.
Middle English skippen, probably of Scandinavian origin, related to Old Norse skopa (to run) and cognates meaning to hop or leap lightly; a choice that looks exactly like an accident unless it is written down as a choice.
To pass over something without stopping — a choice, and one that looks exactly like an accident unless it is written down as a choice.