Definition of "no matter" []

• Irrespective of, regardless of, in spite of (adverb)
• It doesn't matter, it's unimportant, it doesn't make any difference (adverb)

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• "Cavorting with a potential witness, victim, or suspect was bad business, no matter what the cost of survival."
• "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."
• "But the bruise-blue Rothmans and primrose Wisdens always survive the cull and always will no matter how comprehensive the web's wonderful statistical databases become."