1960, in computing, "sequence of one or more characters used to specify the beginning or end of separate, independent regions in text or other data streams," agent noun from delimit.
Entries linking to delimiter
delimit v.
"to mark or fix the boundaries of," 1852, from French délimiter (18c.), from Late Latin delimitare "to mark out as a boundary," from de (see de-) + limitare, from limitem, limes "boundary, limit" (see limit (n.)). Related: Delimited; delimiting.