Определение kleene star в Английский Язык Английский Язык словарь
The asterisk, *, used as an operator to concatenate zero or more strings from a given set, widely used in regular expressions
In mathematical logic and computer science, the Kleene star (or Kleene closure) is a unary operation, either on sets of strings or on sets of symbols or characters. The application of the Kleene star to a set V is written as V*. It is widely used for regular expressions, which is the context in which it was introduced by Stephen Kleene to characterise certain automata