overpunch1
/ˈəʊvəpʌn(t)ʃ/Computing. Now disused
noun
A hole or hole position in the upper portion of a punched card, used to modify the information coded in the lower portion.
- Such a hole may be used to indicate whether a number is negative or positive, or to encode alphabetic characters or other non-numerical data..
Origin
1940s; earliest use found in Journal of the American Statistical Association. From over- + punch.
overpunch2
/ˈəʊvəpʌn(t)ʃ/Computing. Now disused
verb
[with object] To mark as an overpunch; to represent by means of an overpunch.
Origin
1950s; earliest use found in Journal of the American Statistical Association. From overpunch.