1. Not anything important. * /I wanted to see him before he left but it's no matter./ 2. It makes no difference; regardless of. * /She was going to be a singer no matter what difficulties she met./ * /He had to get the car fixed no matter how much it cost./ * /No matter what you try to do, it is important to be able to speak well./ * /You can't go in no matter who you are./ * /Mary wanted to get to school on time, no matter if she went without breakfast./
NO MATTER
Meaning of NO MATTER in English
Slang English vocab. Английский сленговый словарь. 2012