When you puree something you are taking a solid and blending them so well in a food processor that they turn into a heavy liquid-like consistency You can use a mixer for this too
If you puree food, you make it into a puree. Puree the apricots in a liquidiser until completely smooth. if you purée food, you crush it so that it is almost liquid (purée, from purer , from purus; PURE)
food prepared by cooking and straining or processed in a blender rub through a strainer or process in an electric blender; "puree the vegetables for the baby