The term 'baby APRON' can be broken down into two words, 'bib' and 'APRON'. Bib is a three-letter word that refers to a garment worn over the front of the body, usually made of cloth or plastic, to protect clothing from spills. An APRON is a garment worn over the front of the body, usually made of cloth or plastic, to protect clothing from dirt or damage. Baby aprons are often used by parents to protect their baby's clothing from messes and spills.