mightiness noun. ['mʌɪtɪnɪs] ME.
[from MIGHTY adjective + -NESS.]
1. The state or condition of being mighty, powerfulness, great strength. ME.

2. With possess. adjective (as your mightiness etc.): a title of respect given to a personage of exalted rank. Now only in High Mightiness, (a) Hist. an honorific designation of a member of the States General of the Netherlands; (b) iron. a form of address or mode of reference to a person considered to be high and mighty. L16.

[TahlilGaran] English Dictionary ▲