| Noun | 1. | sunblock - a cream spread on the skin; contains a chemical (as PABA) to filter out ultraviolet light and so protect from sunburnemollient, ointment, cream - toiletry consisting of any of various substances in the form of a thick liquid that have a soothing and moisturizing effect when applied to the skin PABA, para aminobenzoic acid - a metabolic acid found in yeast and liver cells; used to make dyes and drugs and sun blockers |