mashEnglishOxford American Thesaurusmash verb mash the potatoes: pulp, crush, puree, cream, smash, squash, pound, beat, macerate, liquidize, liquefy, whip, grind, mince, soften, mangle, chew.noun first pound the garlic to a mash: pulp, puree, mush, paste, pâté, crush, slush, liquid; derogatory pap.