Definition of "no matter what" []

• Whatever; used to indicate that the speaker would do the same thing regardless of the options. (pronoun)
• Definitely, under all and any circumstances. (adverb)

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• "Cavorting with a potential witness, victim, or suspect was bad business, no matter what the cost of survival."
• "Students who earn First Honors are always given their choice of courses, no matter what those of us who know better might think, she said, the jowls flapping around."
• "Most of its essential features can well be reatined and will prove advantageous no matter what new branches of study or methods of teaching are introduced."