Definition of over-punching in English:

over-punching

noun

Computing
disused
  • The punching of a hole in the upper portion of a punched card; the use of overpunches. Also: the provision of two independent sets of hole positions at opposite ends of a single punched card.

Origin

1950s; earliest use found in Science. From overpunch + -ing.

Pronunciation

over-punching

/ˈəʊvəˌpʌn(t)ʃɪŋ/