1.VerbIt is not important; do not fret; used to reassure or comfort the person to whom it is said.
"I'm afraid I’ve broken your mug. — Never mind, it was old and I was going to throw it away.; Did you fall over and hurt your knee? Never mind, I’ll put a bandage on it."
2.VerbDo not be concerned (about someone or something, or about doing something).
"Never mind about me — you go and I’ll join you later.; Here’s some money for you. Never mind about paying me back; you can keep it."
3.VerbIndicates a withdrawal or retractment of a previous statement.
"You're a fool. — What did you call me? — Never mind.; Can you hand me that screwdriver? Wait, never mind, give me the fire extinguisher instead."
4.VerbLet alone; much less.
"They wouldn't go near that place, never mind spending an entire day there."