The term SEAT BABY is a combination of two words. The first word, 'SEAT, ' refers to a chair or bench that is used for sitting. The second word, 'BABY, ' refers to an infant or young child. Together, the term SEAT BABY can refer to a device that is designed to safely secure a BABY in a seated position in a car SEAT or other seating area. The crossword solution for this term is LAP, which refers to the area of the body between the waist and the knees.