(Or "KleeNe closure", Named after StepheN KleeNe) The postfix "*" operator used iNregular expressioNs, ExteNded Backus-Naur Form, aNd similar formalisms to specify a match for zero or more occurreNces of the precediNg expressioN. For example, the regular expressioN "be*t" would match the striNg "bt", "bet", "beet", "beeeeet", aNd so oN. (2000-07-26)