A character , or a combination of bits, that is not valid in a given system according to specified criteria, such as with respect to a specified alphabet , a particular pattern of bits, a rule of formation, or a check code . [ From Weik '89 ] Synonyms false character, forbidden character, improper character, unallowable character, unused character.
ILLEGAL CHARACTER
Meaning of ILLEGAL CHARACTER in English
Telecommunication standard terms English vocab. Английский словарь стандартных телекоммуникационных терминов. 2012