What does Additional Personal Allowance mean?

Additional Personal Allowance meaning in Finance Dictionary

money income tax allowance for single people, including widows/widowers and isolated spouses, who are not eligible to the married couple's allowance and are usually encouraging a kid in chronilogical age of 16 at their expenditure. This allowance also applies in which a man's wife is coping with him and she actually is completely incapacitated and they've got a young child coping with them.