Mince is meat which has been cut into very small pieces using a machine.

If you mince food such as meat, you put it into a machine which cuts it into very small pieces.

If you say that someone, especially a homosexual man, minces somewhere, you mean that they walk there with quick small steps.

If you say that someone does not mince their words, you mean that they speak in a forceful and direct way, especially when saying something unpleasant to someone.