basting means: A method of preparing meats and poultry using pan juices, drippings from roasting. To draw liquid into the tube, the bulb of the baster must be squeezed in liquid. (in Cooking Dictionary)

What else does basting mean?

To moisten food while cooking, spoon or brush it with pan fats, sauces or other liquids to keep it from drying. (in Cooking Dictionary)

The preparation stage of dressingmaking begins with basting. It is a little like cooking. This refers to tacking, which is the use of long loose stitches, that rather than pin, hold the fabric in place until final sewing. Toiles that need to fit on a person’s body are easier and more professional to pin or baste. (in Fashion Dictionary)